REVIEW 2 major objections 6 minor 138 references
Astrometric Accelerations of Provisional Targets for the Habitable Worlds Observatory
T0 review · 2 major / 6 minor · reviewed 2026-08-06 · deepseek-v4-flash
Pith's one-line read Long-baseline astrometry reveals that 54 of 156 provisional HWO target stars are accelerating, 17 with no known cause.
desk verdict Solid precursor science: systematic Hipparcos-Gaia acceleration analysis of the HWO target list; the headline counts are robust, but the error model for the Kervella eta factor deserves a sensitivity check before the 85% claim is quoted. read the letter →
The pith
A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.
The reading
What carries the argument
The central tool is the Hipparcos-Gaia Catalog of Accelerations (HGCA), which supplies a long-term proper motion measured from the position difference between the two missions; subtracting the Gaia epoch proper motion from this long-term proper motion gives the acceleration $\Delta\mu_G$ of the star in the plane of the sky. A semi-analytical relation adapted from Kervella et al. (2019) converts this acceleration into a joint constraint on companion mass $m_2$ and orbital radius $r$, with correction factors $\gamma$ (Gaia time averaging), $\eta = 0.87$ (orbital projection and phase), and $\zeta(P)$ (orbital-period efficiency). Monte Carlo sampling over the eight input parameters produces the mass-separation curves for accelerating stars, and for non-accelerating stars the same machinery yields upper limits above which companions are excluded. This is what carries the argument from a measured proper-motion difference to statements about which companions exist or are ruled out.
What would settle it
Take the 17 unaccounted accelerating targets and observe them with high-contrast imaging and precision radial velocities at the predicted mass-separation locations; if several of the high-significance cases such as HD 212330 A or kappa Tucanae A show no companion, or show a companion far outside the 2-sigma band, the conversion model or the single-companion assumption would be falsified. Alternatively, recompute the accelerations with Gaia DR4's longer baseline: the strongest unaccounted signals should persist if real, while the 2-3 sigma ones should mostly remain; if most disappear, the 2-sigma threshold is too permissive.
Extended reading notes
Core claim
Using proper-motion differences between Hipparcos and Gaia EDR3, the authors identify 54 of 156 HWO provisional targets with statistically significant ($>2\sigma$) astrometric accelerations, and for each accelerating star they compute joint mass-separation constraints on the companion that produces the pull. Comparing these constraints with known planets, brown dwarfs, stellar binaries, and white dwarfs, 37 of the accelerations are consistent with a known companion, while 17 are unaccounted for and likely require close-in stellar companions, brown dwarfs, or giant planets. The same machinery applied to the 102 non-accelerating stars is used to rule out wide-orbit companions over large regions of mass and separation, reaching an average sensitivity of about 85% to $2\,M_\mathrm{Jup}$ planets between 4 and 10 AU. The paper further claims that analytical stability estimates flag 13 systems whose known companions are likely to disrupt Earth-mass planets in their habitable zones.
Load-bearing premise
The load-bearing premise is that the measured proper-motion difference reflects the pull of exactly one companion, and that the empirical correction factors used to convert that pull into a companion mass are accurate for these stars; if either fails, the mass-separation curves, the consistent and inconsistent labels, and the sensitivity percentages all shift.
Editorial extensions
If this is right
- Seventeen accelerating HWO targets now have a concrete follow-up agenda: high-contrast imaging and precision radial velocities aimed at the predicted mass-separation bands should reveal the suspected companions.
- The 102 non-accelerating stars have large regions of companion mass and separation excluded, so companion searches on those systems can focus on shorter-period and lower-mass regimes where astrometry is insensitive.
- Thirteen systems are identified as likely to have habitable zones that are dynamically unstable for Earth-mass planets, which could lower their priority for HWO's core science goal.
- Future Gaia releases should push the same screening down to sub-Jovian planet masses at Solar-System separations, extending the mass-separation constraints to smaller companions.
- If the derived wide-orbit giant planet occurrence rate of about $12\pm3\%$ for this sample holds, HWO targets look broadly similar to the wider solar neighborhood in their giant-planet demographics.
Reading between the lines
- The paper's single-companion assumption means multi-planet systems such as HD 219134 and HD 115404 A are the most likely to be misclassified; a direct test would be a joint Keplerian fit to the radial velocities and astrometry that allows two companions to contribute to the acceleration.
- Because the 3$\sigma$ upper limits are tabulated for all 102 non-accelerating stars, the same screening can be applied verbatim to any future revision of the HWO target list or to other nearby-star samples, without new observations.
- If Gaia DR4 confirms the 17 unaccounted accelerations with a longer baseline, the $\sim12\pm3\%$ wide-orbit giant planet occurrence rate can be checked directly; if several of the low-significance signals vanish, the 2$\sigma$ cutoff and the assumption that most 2-3$\sigma$ signals are real would be the weak link.
- The stability assessment assumes circular, coplanar orbits, so real eccentric or inclined companions would shrink the stable habitable-zone regions further; the 13 flagged systems are therefore likely a lower bound on the number of targets whose habitable zones are threatened.
Editorial analysis
A structured set of objections, weighed in public.
Referee Report
Summary. The manuscript crossmatches the 164-star provisional HWO target list against the Hipparcos-Gaia Catalog of Accelerations, identifying 156 targets with HGCA entries. Using the HGCA proper-motion differences and the Kervella et al. (2019, 2022) semi-analytical conversion, it computes joint companion mass–separation constraints for every target, flags 54 stars with >2σ accelerations, compares these predictions with a compiled catalog of known planets and stellar companions, and attributes 37 of the accelerations to known companions. The remaining 102 non-accelerating targets are used to build average sensitivity maps and exclusion limits, leading to the headline ~85% sensitivity to 2 M_Jup planets between 4 and 10 AU. A final analytical stability assessment identifies 13 systems in which known companions may disrupt habitable-zone planets.
Significance. The primary value is a community resource: per-target mass–separation constraints, upper limits, and sensitivity maps for the HWO precursor target list, with machine-readable tables. The central numbers are derived from an external catalog and an external model rather than fitted, and the authors explicitly flag the single-companion assumption and the circular-orbit stability limits. If the error-distribution issue raised below is resolved, the 54/37/17 accounting and the 85% sensitivity figure are useful and falsifiable inputs to HWO target selection, and the 17 unaccounted accelerators provide a concrete follow-up list.
major comments (2)
- [§2.1, Eq. (2)] The Monte Carlo description states that all eight parameters are drawn from normal distributions, but the paper reports η = 0.87^{+0.12}_{-0.32} without specifying which σ is used for η. Because m2 is inversely proportional to η, a symmetric normal with σ = 0.12 under-represents the large negative tail and narrows the 3σ upper limits for non-accelerating stars and the 2σ credible intervals for accelerating stars; a symmetric normal with σ = 0.32 would draw negative η values and hence negative masses unless truncated. This uncertainty propagates directly into the ~85% sensitivity claim in the abstract and Section 3, the Table 3 fractions, and the Table 1 consistent/inconsistent labels. Please specify the adopted η distribution and test robustness to the asymmetric error, for example using a log-normal or skew-normal distribution or resampling the reported asymmetric interval.
- [§2.2, Table 1] The consistent/inconsistent assignment assumes that a single companion produces the full measured acceleration, as the paper notes. The headline 37/17 count nonetheless includes multi-companion systems such as HD 219134, Lalande 21185, υ Andromedae A, and HD 115404 A, where the acceleration could be a superposition of several companions; in such systems a companion lying below the 2σ curve is not necessarily excluded as a contributor. Please quantify, or at least explicitly list, the systems for which the single-companion assumption affects the classification, and adjust the abstract's '37 accounted for' wording accordingly.
minor comments (6)
- [Section 1 vs Sections 2–3] The introduction says '154 of the 164 targets ... have entries in the HGCA', but Sections 2 and 3 use 156 throughout (54 accelerating + 102 non-accelerating = 156). This is an internal inconsistency that should be fixed.
- [Section 3, bullet list] The sentence 'The other 8 without previously confirmed companions are ...' lists nine stars and includes ι Pavonis, which was already listed among the two disputed binaries (104 Tauri and ι Pavonis). Correct the list or the count.
- [Section 4, stability paragraph] The text says '15 known planets do fall within the region that would affect the stability of an Earth-mass planet', but the following list contains 13 system names; clarify whether the count refers to planets or systems and reconcile the number.
- [Tables 4 and 5] The excerpt for HIP 104214 shows identical 1σ, 2σ, and 3σ values (0.68 M⊙) across many rows. If this is a truncated or degenerate distribution, explain it in the table notes; if it is a formatting artifact, confirm that the machine-readable version is correct.
- [Abstract and Section 3] The phrase 'the remaining 17 accelerating stars' could be read as 17 confirmed unknown companions; since 11 of the 17 have significance between 2σ and 3σ, consider wording such as '17 targets with significant accelerations not accounted for by known companions' to avoid overclaiming.
- [Introduction, paragraph 3] The word 'complimenting' should be 'complementing' when describing how astrometry complements radial velocities and direct imaging.
Circularity Check
Several planet accelerators are classified as 'consistent' using the same Hipparcos-Gaia acceleration that went into their measured masses, partially forcing the 37/17 split.
-
fitted input called prediction
[Section 2.2 (consistent-companion definition) and Section 4.1 (π Mensae, ε Indi A notes)]
"If the companion falls within 2σ of the joint mass and separation constraints predicted from an acceleration, we deem it as being 'consistent' with being the source of the observed acceleration. ... π Mensae b was found by Jones et al. (2002) through RVs, and its most updated parameters from a combination of astrometry, RVs, and imaging are M = 12.33+1.19−1.38 MJup and a = 3.31+0.13−0.15 AU (Feng et al. 2022)."
The HGCA proper-motion difference ΔvT,G is the input to Eq. 2, which produces the mass-separation curves used to define 'consistent'. For π Mensae b and ε Indi Ab, the cited parameters come from a combination of astrometry, RVs, and imaging; the astrometry is the same Hipparcos-Gaia acceleration signal used in this paper. Their masses and semi-major axes are therefore fitted to the same observable that Eq. 2 predicts. Declaring these companions 'consistent' with, and 'accounting for', the measured acceleration is a restatement of that fit rather than an independent test. The same issue applies to HD 140901 c, HD 115404 Ac, and ε Eridani b.
full rationale
The paper's core astrometric measurements come from the external HGCA catalog, and its mass-separation conversion comes from Kervella et al. (2019, 2022). No parameter is fitted to reproduce the 54/37/17 counts or the 85% sensitivity; these are derived from the measured accelerations and the external model. Non-detection upper limits and sensitivity maps are standard uses of non-detections, not circular. The dynamical stability analysis uses independent literature companions and external stability criteria. However, a subset of the 'known companions' used to 'account for' accelerations were themselves characterized with the same Hipparcos-Gaia astrometric signal. For example, π Mensae b's mass and orbit are given from a combination of astrometry, RVs, and imaging; the astrometry is the same HGCA acceleration used to build the prediction curve. Classifying such planets as 'consistent' is a re-use of the same data, so part of the 37/17 accounting is forced. The skeptical concern about asymmetric η uncertainties is a robustness/correctness issue, not circularity. Because the circular subset affects the headline accounting claim but most companions (stellar binaries, RV-only planets) are independent, the overall circularity is partial.
Assumptions & free parameters
free parameters (4)
- Host star mass uncertainty (10 percent)
- Assumed stellar age of 3 Gyr for MIST companion masses =
3 Gyr
- 2-sigma significance cutoff for acceleration detection =
2 sigma (chi-squared = 6.16)
- 3-sigma threshold for sensitivity map =
3 sigma
assumptions (6)
- domain assumption HGCA proper motion differences and chi-squared values are accurate.
- domain assumption The Kervella et al. conversion factors eta and zeta provide an unbiased mapping from Delta-mu-G to companion mass and separation.
- domain assumption Only one massive companion is accelerating the host star.
- domain assumption Known companion catalogs are complete for the purpose of classification.
- domain assumption Projected separation to semi-major axis conversion via the Dupuy and Liu (2011) uniform-eccentricity factor is valid.
- domain assumption Quarles et al. (2018, 2020) stability limits and the Hill stability criterion apply to HZ stability for circular coplanar orbits.
Cite this review
Pith. "Pith review of Astrometric Accelerations of Provisional Targets for the Habitable Worlds Observatory." pith.science (2026). https://pith.science/paper/6RELJZ6S
@misc{pith2026250621768,
author = {Pith},
title = {Pith review of: Astrometric Accelerations of Provisional Targets for the Habitable Worlds Observatory},
year = {2026},
howpublished = {\url{https://pith.science/paper/6RELJZ6S}},
note = {Machine review of arXiv:2506.21768}
}
abstract
NASA's Habitable Worlds Observatory (HWO) will be the first space telescope capable of directly imaging Earth-like planets in the habitable zones of Sun-like stars to probe their atmospheres for signs of life. Now in its early stages of design, a list of the 164 most promising targets for HWO has been released to the community to carry out precursor science. Massive companions in these systems--stars, brown dwarfs, or giant planets--could preclude the existence of Earth-sized planets in the habitable zone by impacting their long-term dynamical stability. Here, we use astrometry from Hipparcos and Gaia EDR3 to identify stars in the HWO preliminary target list that exhibit astrometric accelerations and determine joint constraints on the expected mass and separation of these companions. We find that 54 HWO targets have significant astrometric accelerations, 37 of which are accounted for by known giant planets and stellar companions. Follow-up efforts are required to clarify the specific nature of the suspected companions around the remaining 17 accelerating stars. Stars without significant accelerations are used to rule out large regions of companion mass and separation down to planetary masses. We find that with Hipparcos and Gaia EDR3 we are $\sim$85$\%$ sensitive to 2 $M_\mathrm{Jup}$ planets between 4 and 10 AU. Future Gaia releases will provide sensitivity to sub-Jovian mass planets on Solar System scales for provisional HWO targets. Finally, using analytical estimates of dynamical stability, we find that 13 HWO targets have known stellar or planetary companions that are likely to disrupt habitable-zone planets.
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-
[4]
Abt , H. A. 2009, , 180, 117, 10.1088/0067-0049/180/1/117
-
[5]
Agnew , M. T., Maddison , S. T., Horner , J., & Kane , S. R. 2019, , 485, 4703, 10.1093/mnras/stz345
-
[6]
Alonso-Floriano , F. J., Morales , J. C., Caballero , J. A., et al. 2015, , 577, A128, 10.1051/0004-6361/201525803
-
[7]
2012, Journal of Double Star Observations, 8, 15
Anton , R. 2012, Journal of Double Star Observations, 8, 15
2012
-
[8]
2019, Journal of Double Star Observations, 15, 336
---. 2019, Journal of Double Star Observations, 15, 336
2019
Show all 138 references
-
[9]
H., Fletcher , J
Batten , A. H., Fletcher , J. M., & Mann , P. J. 1978, Publications of the Dominion Astrophysical Observatory Victoria, 15, 121
1978
-
[10]
P., Endl , M., Cochran , W
Bowler , B. P., Endl , M., Cochran , W. D., et al. 2021, , 913, L26, 10.3847/2041-8213/abfec8
2021 doi
-
[11]
Brandt , T. D. 2018, , 239, 31, 10.3847/1538-4365/aaec06
2018 doi
- [12]
-
[13]
D., Dupuy , T
Brandt , T. D., Dupuy , T. J., & Bowler , B. P. 2019, , 158, 140, 10.3847/1538-3881/ab04a8
2019 doi
-
[14]
D., Dupuy , T
Brandt , T. D., Dupuy , T. J., Li , Y., et al. 2021, , 162, 186, 10.3847/1538-3881/ac042e
2021 doi
-
[15]
R., Quirion , P
Bruntt , H., Bedding , T. R., Quirion , P. O., et al. 2010, , 405, 1907, 10.1111/j.1365-2966.2010.16575.x
2010
-
[16]
K., et al
Bryson , S., Kunimoto , M., Kopparapu , R. K., et al. 2021, , 161, 36, 10.3847/1538-3881/abc418
2021 doi
-
[17]
J., Kirkpatrick , J
Burgasser , A. J., Kirkpatrick , J. D., Cutri , R. M., et al. 2000, , 531, L57, 10.1086/312522
2000 doi
-
[18]
J., Christiansen , J
Burke , C. J., Christiansen , J. L., Mullally , F., et al. 2015, , 809, 8, 10.1088/0004-637X/809/1/8
2015 doi
-
[19]
P., Marcy , G
Butler , R. P., Marcy , G. W., Fischer , D. A., et al. 1999, , 526, 916, 10.1086/308035
1999 doi
-
[20]
P., Marcy , G
Butler , R. P., Marcy , G. W., Williams , E., Hauser , H., & Shirts , P. 1997, , 474, L115, 10.1086/310444
1997 doi
-
[21]
P., Vogt , S
Butler , R. P., Vogt , S. S., Laughlin , G., et al. 2017, , 153, 208, 10.3847/1538-3881/aa66ca
2017 doi
-
[22]
Carr , M. H. 1996, Water on Mars
1996
-
[23]
2004, , 601, 289, 10.1086/380442
Chanam \'e , J., & Gould , A. 2004, , 601, 289, 10.1086/380442
2004 doi
-
[24]
D., et al
Chen , M., Li , Y., Brandt , T. D., et al. 2022, , 163, 288, 10.3847/1538-3881/ac66d2
2022 doi
-
[25]
2014, , 437, 879, 10.1093/mnras/stt1953
Chini , R., Fuhrmann , K., Barr , A., et al. 2014, , 437, 879, 10.1093/mnras/stt1953
2014 doi
-
[26]
2016, , 823, 102, 10.3847/0004-637X/823/2/102
Choi , J., Dotter , A., Conroy , C., et al. 2016, , 823, 102, 10.3847/0004-637X/823/2/102
2016 doi
- [27]
-
[28]
Corbally , C. J. 1984, , 55, 657, 10.1086/190973
1984 doi
- [29]
-
[30]
M., Brandt , T
Currie , T., Brandt , G. M., Brandt , T. D., et al. 2023, Science, 380, 198, 10.1126/science.abo6192
2023 doi
-
[31]
2011, Journal of Double Star Observations, 7, 104
Daley , J. 2011, Journal of Double Star Observations, 7, 104
2011
-
[32]
V., Fatuzzo , M., & Adams , F
David , E.-M., Quintana , E. V., Fatuzzo , M., & Adams , F. C. 2003, , 115, 825, 10.1086/376395
2003 doi
-
[33]
J., Nielsen , E
De Rosa , R. J., Nielsen , E. L., Wahhaj , Z., et al. 2023, , 672, A94, 10.1051/0004-6361/202345877
2023 doi
-
[34]
2016, , 222, 8, 10.3847/0067-0049/222/1/8
Dotter , A. 2016, , 222, 8, 10.3847/0067-0049/222/1/8
2016 doi
- [35]
-
[36]
El-Badry , K., Rix , H.-W., & Heintz , T. M. 2021, , 506, 2269, 10.1093/mnras/stab323
2021 doi
-
[37]
2002, , 392, 671, 10.1051/0004-6361:20020937
Endl , M., K \"u rster , M., Els , S., et al. 2002, , 392, 671, 10.1051/0004-6361:20020937
2002 doi
-
[38]
2019, , 490, 5002, 10.1093/mnras/stz2912
Feng , F., Anglada-Escud \'e , G., Tuomi , M., et al. 2019, , 490, 5002, 10.1093/mnras/stz2912
2019 doi
-
[39]
P., Vogt , S
Feng , F., Butler , R. P., Vogt , S. S., et al. 2022, , 262, 21, 10.3847/1538-4365/ac7e57
2022 doi
- [40]
-
[41]
P., Zhou , Y., et al
Franson , K., Bowler , B. P., Zhou , Y., et al. 2023, , 950, L19, 10.3847/2041-8213/acd6f6
2023 doi
-
[42]
2015, , 809, 107, 10.1088/0004-637X/809/1/107
Fuhrmann , K., & Chini , R. 2015, , 809, 107, 10.1088/0004-637X/809/1/107
2015 doi
-
[43]
2017, , 836, 139, 10.3847/1538-4357/836/1/139
Fuhrmann , K., Chini , R., Kaderhandt , L., & Chen , Z. 2017, , 836, 139, 10.3847/1538-4357/836/1/139
2017 doi
-
[44]
J., Rosenthal , L
Fulton , B. J., Rosenthal , L. J., Hirsch , L. A., et al. 2021, , 255, 14, 10.3847/1538-4365/abfcc1
2021 doi
-
[45]
2022, VizieR Online Data Catalog: Gaia DR3 Part 1
Gaia Collaboration . 2022, VizieR Online Data Catalog: Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022) , VizieR On-line Data Catalog: I/355. Originally published in: Astron. Astrophys., in prep. (2022), 10.26093/cds/vizier.1355
2022 doi
-
[46]
Gaia Collaboration , Prusti , T., de Bruijne , J. H. J., et al. 2016, , 595, A1, 10.1051/0004-6361/201629272
2016 doi
-
[47]
Gaia Collaboration , Vallenari , A., Brown , A. G. A., et al. 2023, , 674, A1, 10.1051/0004-6361/202243940
2023 doi
-
[48]
H., et al
Gandolfi , D., Barrag \'a n , O., Livingston , J. H., et al. 2018, , 619, L10, 10.1051/0004-6361/201834289
2018 doi
-
[49]
Gianninas , A., Bergeron , P., & Ruiz , M. T. 2011, , 743, 138, 10.1088/0004-637X/743/2/138
2011 doi
-
[50]
2017, Nature Astronomy, 1, 0056, 10.1038/s41550-017-0056
Gillon , M., Demory , B.-O., Van Grootel , V., et al. 2017, Nature Astronomy, 1, 0056, 10.1038/s41550-017-0056
2017 doi
-
[51]
M., Beust , H., et al
Grandjean , A., Lagrange , A. M., Beust , H., et al. 2019, , 627, L9, 10.1051/0004-6361/201935044
2019 doi
-
[52]
O., Corbally , C
Gray , R. O., Corbally , C. J., Garrison , R. F., et al. 2006, , 132, 161, 10.1086/504637
2006 doi
-
[53]
O., Corbally , C
Gray , R. O., Corbally , C. J., Garrison , R. F., McFadden , M. T., & Robinson , P. E. 2003, , 126, 2048, 10.1086/378365
2003 doi
-
[54]
O., Napier , M
Gray , R. O., Napier , M. G., & Winkler , L. I. 2001, , 121, 2148, 10.1086/319956
2001 doi
-
[55]
K., Dressing , C
Harada , C. K., Dressing , C. D., Kane , S. R., & Ardestani , B. A. 2024 a , , 272, 30, 10.3847/1538-4365/ad3e81
2024 doi
-
[56]
K., Dressing , C
Harada , C. K., Dressing , C. D., Kane , S. R., et al. 2024 b , arXiv e-prints, arXiv:2409.10679, 10.48550/arXiv.2409.10679
2024 doi
-
[57]
P., Cochran , W
Hatzes , A. P., Cochran , W. D., McArthur , B., et al. 2000, , 544, L145, 10.1086/317319
2000 doi
-
[58]
P., Gandolfi , D., Korth , J., et al
Hatzes , A. P., Gandolfi , D., Korth , J., et al. 2022, , 163, 223, 10.3847/1538-3881/ac5dcb
2022 doi
-
[59]
1998, , 129, 431, 10.1051/aas:1998195
Hauck , B., & Mermilliod , M. 1998, , 129, 431, 10.1051/aas:1998195
1998 doi
-
[60]
1785, Philosophical Transactions of the Royal Society of London Series I, 75, 40
Herschel , W. 1785, Philosophical Transactions of the Royal Society of London Series I, 75, 40
-
[61]
D., et al
Hinkley , S., Lacour , S., Marleau , G. D., et al. 2023, , 671, L5, 10.1051/0004-6361/202244727
2023 doi
-
[62]
A., Rosenthal , L., Fulton , B
Hirsch , L. A., Rosenthal , L., Fulton , B. J., et al. 2021, , 161, 134, 10.3847/1538-3881/abd639
2021 doi
-
[63]
X., Burt , J., Vanderburg , A., et al
Huang , C. X., Burt , J., Vanderburg , A., et al. 2018, , 868, L39, 10.3847/2041-8213/aaef91
2018 doi
-
[64]
A., Fulton , B., Isaacson , H., et al
Hurt , S. A., Fulton , B., Isaacson , H., et al. 2022, , 163, 218, 10.3847/1538-3881/ac5c47
2022 doi
-
[65]
2015, Journal of Double Star Observations, 11, 91
Iverson , E., & Nugent , R. 2015, Journal of Double Star Observations, 11, 91
2015
-
[66]
G., Pichardo , B., & Aguilar , L
Jaime , L. G., Pichardo , B., & Aguilar , L. 2012, , 427, 2723, 10.1111/j.1365-2966.2012.21839.x
2012
-
[67]
C., Endl , M., Cochran , W
Johnson , M. C., Endl , M., Cochran , W. D., et al. 2016, , 821, 74, 10.3847/0004-637X/821/2/74
2016 doi
-
[68]
Jones , H. R. A., Paul Butler , R., Tinney , C. G., et al. 2002, , 333, 871, 10.1046/j.1365-8711.2002.05459.x
2002
-
[69]
2017, , 55, 433, 10.1146/annurev-astro-082214-122238
Kaltenegger , L. 2017, , 55, 433, 10.1146/annurev-astro-082214-122238
2017 doi
- [70]
-
[71]
R., Li , Z., Turnbull , M
Kane , S. R., Li , Z., Turnbull , M. C., Dressing , C. D., & Harada , C. K. 2024, , 168, 195, 10.3847/1538-3881/ad6a50
2024 doi
-
[72]
F., Whitmire , D
Kasting , J. F., Whitmire , D. P., & Reynolds , R. T. 1993, , 101, 108, 10.1006/icar.1993.1010
1993
- [73]
-
[74]
O., Castanheira , B
Kepler , S. O., Castanheira , B. G., Costa , A. F. M., & Koester , D. 2006, , 372, 1799, 10.1111/j.1365-2966.2006.10992.x
2006
-
[75]
2019, , 623, A72, 10.1051/0004-6361/201834371
Kervella , P., Arenou , F., Mignard , F., & Th \'e venin , F. 2019, , 623, A72, 10.1051/0004-6361/201834371
2019 doi
-
[76]
2022, , 657, A7, 10.1051/0004-6361/202142146
Kervella , P., Arenou , F., & Th \'e venin , F. 2022, , 657, A7, 10.1051/0004-6361/202142146
2022 doi
-
[77]
Kharchenko , N. V. 2001, Kinematika i Fizika Nebesnykh Tel, 17, 409
2001
-
[78]
R., McCaughrean , M
King , R. R., McCaughrean , M. J., Homeier , D., et al. 2010, , 510, A99, 10.1051/0004-6361/200912981
2010 doi
-
[79]
D., Henry , T
Kirkpatrick , J. D., Henry , T. J., & McCarthy , Jr., D. W. 1991, , 77, 417, 10.1086/191611
1991 doi
-
[80]
D., Kellogg , K., Schneider , A
Kirkpatrick , J. D., Kellogg , K., Schneider , A. C., et al. 2016, , 224, 36, 10.3847/0067-0049/224/2/36
2016 doi
-
[81]
K., & Barnes , R
Kopparapu , R. K., & Barnes , R. 2010, , 716, 1336, 10.1088/0004-637X/716/2/1336
2010 doi
-
[82]
K., Ramirez , R
Kopparapu , R. K., Ramirez , R. M., SchottelKotte , J., et al. 2014, , 787, L29, 10.1088/2041-8205/787/2/L29
2014 doi
-
[83]
K., Ramirez , R., Kasting , J
Kopparapu , R. K., Ramirez , R., Kasting , J. F., et al. 2013, , 765, 131, 10.1088/0004-637X/765/2/131
2013 doi
-
[84]
L., Ireland , M
Kraus , A. L., Ireland , M. J., Huber , D., Mann , A. W., & Dupuy , T. J. 2016, , 152, 8, 10.3847/0004-6256/152/1/8
2016 doi
-
[85]
Lada , C. J. 2006, , 640, L63, 10.1086/503158
2006 doi
-
[86]
A., Mamajek , E
Laliotis , K., Burt , J. A., Mamajek , E. E., et al. 2023, , 165, 176, 10.3847/1538-3881/acc067
2023 doi
-
[87]
D., Brandt , G
Li , Y., Brandt , T. D., Brandt , G. M., et al. 2021, , 162, 266, 10.3847/1538-3881/ac27ab
2021 doi
-
[88]
J., Ruffio , J.-B., et al
Llop-Sayson , J., Wang , J. J., Ruffio , J.-B., et al. 2021, , 162, 181, 10.3847/1538-3881/ac134a
2021 doi
-
[89]
2010, Observations et Travaux, 75, 17
Losse , F. 2010, Observations et Travaux, 75, 17
2010
-
[90]
J., Kirkpatrick , J
Lowrance , P. J., Kirkpatrick , J. D., & Beichman , C. A. 2002, , 572, L79, 10.1086/341554
2002 doi
-
[91]
2023, NASA ExEP Mission Star List for the Habitable Worlds Observatory
Mamajek , E., & Stapelfeldt , K. 2023, NASA ExEP Mission Star List for the Habitable Worlds Observatory
2023
-
[92]
W., Dupuy , T., Kraus , A
Mann , A. W., Dupuy , T., Kraus , A. L., et al. 2019, , 871, 63, 10.3847/1538-4357/aaf3bc
2019 doi
-
[93]
1982, Celestial Mechanics, 26, 311, 10.1007/BF01230725
Marchal , C., & Bozis , G. 1982, Celestial Mechanics, 26, 311, 10.1007/BF01230725
1982 doi
-
[94]
2013, , 551, A90, 10.1051/0004-6361/201219639
Marmier , M., S \'e gransan , D., Udry , S., et al. 2013, , 551, A90, 10.1051/0004-6361/201219639
2013 doi
-
[95]
D., Hartkopf , W
Mason , B. D., Hartkopf , W. I., & Miles , K. N. 2017, , 154, 200, 10.3847/1538-3881/aa803e
2017 doi
-
[96]
D., Williams , S
Mason , B. D., Williams , S. J., Matson , R. A., et al. 2021, , 162, 53, 10.3847/1538-3881/abfaa2
2021 doi
-
[97]
D., Wycoff , G
Mason , B. D., Wycoff , G. L., Hartkopf , W. I., Douglass , G. G., & Worley , C. E. 2001, , 122, 3466, 10.1086/323920
2001 doi
-
[98]
S., Carter , Carter, A
Matthews , E. S., Carter , Carter, A. L., Pathak , P., & Morley , C. V. 2024, Nature, 10.1038/s41586-024-07837-8
2024 doi
-
[99]
J., et al
Mawet , D., Hirsch , L., Lee , E. J., et al. 2019, , 157, 33, 10.3847/1538-3881/aaef8a
2019 doi
-
[100]
2003, The Messenger, 114, 20
Mayor , M., Pepe , F., Queloz , D., et al. 2003, The Messenger, 114, 20
2003
-
[101]
J., Close , L
McCaughrean , M. J., Close , L. M., Scholz , R. D., et al. 2004, , 413, 1029, 10.1051/0004-6361:20034292
2004 doi
-
[102]
Mermilliod , J. C. 1997, VizieR Online Data Catalog: Homogeneous Means in the UBV System (Mermilliod 1991) , VizieR On-line Data Catalog: II/168. Originally published in: Institut d'Astronomie, Universite de Lausanne (1991)
1991
-
[103]
2023, , 672, A93, 10.1051/0004-6361/202345865
Mesa , D., Gratton , R., Kervella , P., et al. 2023, , 672, A93, 10.1051/0004-6361/202345865
2023 doi
-
[104]
2015, , 584, A72, 10.1051/0004-6361/201526822
Motalebi , F., Udry , S., Gillon , M., et al. 2015, , 584, A72, 10.1051/0004-6361/201526822
2015 doi
-
[105]
G., et al
Naef , D., Mayor , M., Korzennik , S. G., et al. 2003, , 410, 1051, 10.1051/0004-6361:20031341
2003 doi
-
[106]
2025, Planetary Systems, Version: 2025-03-31 11:50, NExScI-Caltech/IPAC, 10.26133/NEA12
NASA Exoplanet Archive . 2025, Planetary Systems, Version: 2025-03-31 11:50, NExScI-Caltech/IPAC, 10.26133/NEA12
2025 doi
-
[107]
2021, Pathways to Discovery in Astronomy and Astrophysics for the 2020s , 10.17226/26141
National Academies of Sciences , E., & Medicine. 2021, Pathways to Discovery in Astronomy and Astrophysics for the 2020s , 10.17226/26141
2021 doi
-
[108]
D., Plavchan , P., Burt , J
Newman , P. D., Plavchan , P., Burt , J. A., et al. 2023, , 165, 151, 10.3847/1538-3881/acad07
2023 doi
-
[109]
L., De Rosa , R
Nielsen , E. L., De Rosa , R. J., Macintosh , B., et al. 2019, , 158, 13, 10.3847/1538-3881/ab16e9
2019 doi
-
[110]
2011, , 192, 3, 10.1088/0067-0049/192/1/3
Paxton , B., Bildsten , L., Dotter , A., et al. 2011, , 192, 3, 10.1088/0067-0049/192/1/3
2011 doi
-
[111]
2013, , 208, 4, 10.1088/0067-0049/208/1/4
Paxton , B., Cantiello , M., Arras , P., et al. 2013, , 208, 4, 10.1088/0067-0049/208/1/4
2013 doi
-
[112]
2015, , 220, 15, 10.1088/0067-0049/220/1/15
Paxton , B., Marchant , P., Schwab , J., et al. 2015, , 220, 15, 10.1088/0067-0049/220/1/15
2015 doi
-
[113]
B., et al
Paxton , B., Schwab , J., Bauer , E. B., et al. 2018, , 234, 34, 10.3847/1538-4365/aaa5a8
2018 doi
-
[114]
Perryman , M. A. C., Lindegren , L., Kovalevsky , J., et al. 1997, , 323, L49
1997
-
[115]
M., Rubini , P., Kiefer , F., & Chomez , A
Philipot , F., Lagrange , A. M., Rubini , P., Kiefer , F., & Chomez , A. 2023, , 670, A65, 10.1051/0004-6361/202245396
2023 doi
-
[116]
2020, , 159, 80, 10.3847/1538-3881/ab64fa
Quarles , B., Li , G., Kostov , V., & Haghighipour , N. 2020, , 159, 80, 10.3847/1538-3881/ab64fa
2020 doi
-
[117]
2018, , 856, 150, 10.3847/1538-4357/aab264
Quarles , B., Satyal , S., Kostov , V., Kaib , N., & Haghighipour , N. 2018, , 856, 150, 10.3847/1538-4357/aab264
2018 doi
-
[118]
A., Henry , T
Raghavan , D., McAlister , H. A., Henry , T. J., et al. 2010, , 190, 1, 10.1088/0067-0049/190/1/1
2010 doi
-
[119]
2022, in The 21st Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun, Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun, 218, 10.5281/zenodo.7669746
Reyl \'e , C., Jardine , K., Fouqu \'e , P., et al. 2022, in The 21st Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun, Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun, 218, 10.5281/zenodo.7669746
2022 doi
-
[120]
L., Matthews , E., Ceva , W., et al
Rickman , E. L., Matthews , E., Ceva , W., et al. 2022, , 668, A140, 10.1051/0004-6361/202244633
2022 doi
- [121]
-
[122]
R., Duch \^e ne , G., Tom , H., et al
Rodriguez , D. R., Duch \^e ne , G., Tom , H., et al. 2015, , 449, 3160, 10.1093/mnras/stv483
2015 doi
-
[123]
J., Fulton , B
Rosenthal , L. J., Fulton , B. J., Hirsch , L. A., et al. 2021, , 255, 8, 10.3847/1538-4365/abe23c
2021 doi
-
[124]
D., McCaughrean , M
Scholz , R. D., McCaughrean , M. J., Lodieu , N., & Kuhlbrodt , B. 2003, , 398, L29, 10.1051/0004-6361:20021847
2003 doi
-
[125]
C., & Head , J
Solomon , S. C., & Head , J. W. 1991, Science, 252, 252, 10.1126/science.252.5003.252
1991 doi
-
[126]
B., Sills , A., et al
Takeda , G., Ford , E. B., Sills , A., et al. 2007, , 168, 297, 10.1086/509763
2007 doi
-
[127]
2021, , 161, 144, 10.3847/1538-3881/abda42
Tokovinin , A. 2021, , 161, 144, 10.3847/1538-3881/abda42
2021 doi
-
[128]
Torres , C. A. O., Quast , G. R., da Silva , L., et al. 2006, , 460, 695, 10.1051/0004-6361:20065602
2006 doi
-
[129]
W., Stark , C
Tuchow , N. W., Stark , C. C., & Mamajek , E. 2024, , 167, 139, 10.3847/1538-3881/ad25ec
2024 doi
-
[130]
2007, , 474, 653, 10.1051/0004-6361:20078357
van Leeuwen , F. 2007, , 474, 653, 10.1051/0004-6361:20078357
2007 doi
-
[131]
Van Zandt , J., & Petigura , E. A. 2024, , 167, 250, 10.3847/1538-3881/ad390b
2024 doi
-
[132]
Venner , A., Vanderburg , A., & Pearce , L. A. 2021, , 162, 12, 10.3847/1538-3881/abf932
2021 doi
-
[133]
S., Butler , R
Vogt , S. S., Butler , R. P., Marcy , G. W., et al. 2005, , 632, 638, 10.1086/432901
2005 doi
-
[134]
S., Allen , S
Vogt , S. S., Allen , S. L., Bigelow , B. C., et al. 1994, in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series, Vol. 2198, Instrumentation in Astronomy VIII, ed. D. L. Crawford & E. R. Craine , 362, 10.1117/12.176725
1994 doi
-
[135]
S., Burt , J., Meschiari , S., et al
Vogt , S. S., Burt , J., Meschiari , S., et al. 2015, , 814, 12, 10.1088/0004-637X/814/1/12
2015 doi
-
[136]
2003, , 8188, 2
Volk , K., Blum , R., Walker , G., & Puxley , P. 2003, , 8188, 2
2003
- [137]
-
[138]
K., Oswalt , T
Zhao , J. K., Oswalt , T. D., Rudkin , M., Zhao , G., & Chen , Y. Q. 2011, , 141, 107, 10.1088/0004-6256/141/4/107
2011 doi
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