{"total":14,"items":[{"citing_arxiv_id":"2606.28937","ref_index":14,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Quadrupole and quadratic-in-spin effects in quasicircular, spinning, asymmetric binaries","primary_cat":"gr-qc","submitted_at":"2026-06-27T14:17:05+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":7.0,"formal_verification":"none","one_line_summary":"Calculates energy fluxes with quadratic-in-spin and quadrupole effects for small-mass-ratio spinning binaries in self-force theory, providing numerical data and sixth-order PN expansions.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"(LISA), LISA Definition Study Report, (2024), arXiv:2402.07571 [astro-ph.CO]. [12] A. Abacet al.(ET), The Science of the Einstein Tele- scope, JCAP03, 081, arXiv:2503.12263 [gr-qc]. [13] M. Pürrer and C.-J. Haster, Gravitational waveform ac- curacy requirements for future ground-based detectors, Phys. Rev. Res.2, 023151 (2020), arXiv:1912.10055 [gr- qc]. [14] Q. Hu and J. Veitch, Assessing the model waveform ac- curacy of gravitational waves, Phys. Rev. D106, 044042 (2022), arXiv:2205.08448 [gr-qc]. [15] N. Afshordiet al.(LISA Consortium Waveform Work- ing Group), Waveform modelling for the Laser Interfer- ometer Space Antenna, Living Rev. Rel.28, 9 (2025), arXiv:2311.01300 [gr-qc]. [16] A. Dhani, S. H."},{"citing_arxiv_id":"2605.28716","ref_index":87,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Eccentric and unbound compact binaries in the LIGO-Virgo-KAGRA catalog: parameter estimation and waveform systematics with SEOBNRv6EHM","primary_cat":"gr-qc","submitted_at":"2026-05-27T16:38:48+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":6.0,"formal_verification":"none","one_line_summary":"SEOBNRv6EHM reduces parameter biases for eccentric binaries versus prior models and shows mild support for eccentricity in five catalog events plus comparable unbound fits for three high-mass events.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"learning inference codeDINGO[88, 89], Ref. [78] analyzed 57 binary black hole (BBH) events from O1-O3 and iden- tified three events with Bayes factors favoring nonzero or- bital eccentricity-GW200129 065458, GW190701 203306, and GW200208 222617-as well as others with mild support. The analysis was extended to 85 BBHs from the first part of the fourth observing run (O4a) [87], using theSEOBNRv5EHM model [52] with bothDINGOandBilby[90, 91], finding no additional candidates with significant support. Both stud- ies highlighted the critical role of glitch mitigation: the in- ferred support for eccentricity in GW200129 065458 and GW190701 203306-both affected by glitches in the LIGO Livingston detector-ranges from modest to strong depend-"},{"citing_arxiv_id":"2605.20320","ref_index":28,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"The third wheel: ringdown and lensing of triple systems","primary_cat":"gr-qc","submitted_at":"2026-05-19T18:00:00+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":6.0,"formal_verification":"none","one_line_summary":"Numerical relativity simulations of triple black hole systems reveal redshift effects and gravitational lensing in ringdown signals from head-on mergers, with no additional black hole formation from amplified waves.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"relativity using binary extreme-mass-ratio inspirals,\" Mon. Not. Roy. Astron. Soc.485, L29-L33 (2019), arXiv:1801.07060 [gr-qc]. [27] Yucheng Yin, Josh Mathews, Alvin J. K. Chua, and Xian Chen, \"Relativistic model of binary extreme-mass- ratio inspiral systems and their gravitational radiation,\" Phys. Rev. D111, 103007 (2025), arXiv:2410.09796 [gr- qc]. [28] Ye Jiang, Wen-Biao Han, Xing-Yu Zhong, Ping Shen, Zi-Ren Luo, and Yue-Liang Wu, \"Distinguishability of binary extreme-mass-ratio inspirals in low frequency band,\" Eur. Phys. J. C84, 478 (2024). [29] Michael Zevin, Johan Samsing, Carl Rodriguez, Carl- Johan Haster, and Enrico Ramirez-Ruiz, \"Eccentric Black Hole Mergers in Dense Star Clusters: The Role"},{"citing_arxiv_id":"2605.18742","ref_index":24,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"A universal framework to identify eccentric binary mergers: GW200105 case study","primary_cat":"astro-ph.HE","submitted_at":"2026-05-18T17:58:22+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":7.0,"formal_verification":"none","one_line_summary":"A reference-frequency-independent detection statistic for eccentric binary mergers is introduced and applied to GW200105, yielding ln B ≤ 0.9 in favor of the eccentric aligned-spin model over the quasi-circular precessing model.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2605.11703","ref_index":95,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"GW240925 and GW250207: Astrophysical Calibration of Gravitational-wave Detectors","primary_cat":"gr-qc","submitted_at":"2026-05-12T07:58:35+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":8.0,"formal_verification":"none","one_line_summary":"The first informative astrophysical calibration of gravitational-wave detectors is reported using GW240925 and GW250207.","context_count":1,"top_context_role":"background","top_context_polarity":"unclear","context_text":"the Second LIGO-Virgo Gravitational-Wave Transient Cat- alog, Astrophys. J. Lett.913, L7 (2021), arXiv:2010.14533 [astro-ph.HE]. [94] R. Abbottet al.(LIGO Scientific Collaboration, Virgo Collab- oration, KAGRA Collaboration), GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo during the Sec- ond Part of the Third Observing Run, Phys. Rev. X13, 041039 (2023), arXiv:2111.03606 [gr-qc]. [95] A. G. Abacet al.(LIGO Scientific, KAGRA), GW241011 and GW241110: Exploring Binary Formation and Fundamen- tal Physics with Asymmetric, High-spin Black Hole Coales- cences, Astrophys. J. Lett.993, L21 (2025), arXiv:2510.26931 [astro-ph.HE]. [96] K. S. Thorne, Multipole Expansions of Gravitational Radia- tion, Rev. Mod. Phys.52, 299 (1980). [97] L. Blanchet, Gravitational Radiation from Post-Newtonian"},{"citing_arxiv_id":"2605.03756","ref_index":2,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Resonances as signatures of scalar clouds in eccentric extreme-mass-ratio inspirals","primary_cat":"gr-qc","submitted_at":"2026-05-05T13:41:07+00:00","verdict":null,"verdict_confidence":null,"novelty_score":null,"formal_verification":null,"one_line_summary":null,"context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"UID/PRR/00099/2025 and grant No. UID/00099/2025. QX gratefully acknowledges sup- port from FCT grant 2025.01546.BD. RV gratefully ac- knowledges the support of the Dutch Research Council (NWO) through an Open Competition Domain Science-M grant, project number OCENW.M.21.375. [1] A. G. Abacet al.(LIGO Scientific, VIRGO, KAGRA), (2025), arXiv:2508.18082 [gr-qc]. [2] A. G. Abacet al.(LIGO Scientific, Virgo, KAGRA), Astrophys. J. Lett.993, L21 (2025), arXiv:2510.26931 [astro-ph.HE]. [3] A. G. Abacet al.(LIGO Scientific, Virgo, KAGRA), Phys. Rev. Lett.135, 111403 (2025), arXiv:2509.08054 [gr-qc]. [4] A. G. Abacet al.(LIGO Scientific, VIRGO, KAGRA), Astrophys. J. Lett.993, L25 (2025), arXiv:2507.08219 [astro-ph.HE]."},{"citing_arxiv_id":"2604.15885","ref_index":34,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Gravitational-wave astronomy requires population-informed parameter estimation","primary_cat":"gr-qc","submitted_at":"2026-04-17T09:31:16+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":4.0,"formal_verification":"none","one_line_summary":"Population-informed hierarchical parameter estimation is required for unbiased astrophysical interpretation of gravitational-wave events rather than using standard individual posteriors with reference priors.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"the highest spin in GW231123 (ρ= 0.28), despite the latter being near maximal. In short, the population is necessarily most correlated with the most extreme pa- rameter measurements, not individual events. Informing out-of-catalog events-Interesting GW events in ongoing observing runs are highlighted before complete catalogs, e.g., GW241011 and GW241110 [34]. Though common [35, 36], cherrypicked events should not be added to population fits [28]. Instead, the posterior ppop(θ|d,{d n})∝ L(d|θ)p pop(θ|{dn}) (3) for the parametersθof a new event with datadcan be informed independently by the existing catalog with the priorp pop(θ|{dn}) = R dλ ppop(θ|λ)ppop(λ|{dn}). We assess the effect on the source properties of GW241011"},{"citing_arxiv_id":"2604.11903","ref_index":18,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Post-Newtonian inspiral waveform model for eccentric precessing binaries with higher-order modes and matter effects","primary_cat":"gr-qc","submitted_at":"2026-04-13T18:00:35+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":6.0,"formal_verification":"none","one_line_summary":"pyEFPEHM extends prior PN models to include higher-order quasi-circular phasing, generalized precession solutions, and eccentric corrections up to 1PN in selected multipoles for eccentric precessing binaries with matter effects.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"The black lines denote the injected parame- ter values. to preserve the overall duration and phase evolution of the waveform. VII. CONCLUSION Accurate and computationally efficient waveform mod- els for eccentric and precessing binaries are essential for probing formation channels of compact objects, such as dynamical captures and binary-binary interacitons [151- 156], hierarchical mergers [18], and binaries in which the Lidov-Kozai mechanism [37-39] plays a central role, such as in stellar triples [34, 157-159] or driven by pertur- bations from a massive black hole at the center of the host galaxy [160, 161]. As detector sensitivities improve, future observations will probe further into the inspiral and detect higher signal-to-noise ratio events, making"},{"citing_arxiv_id":"2604.09828","ref_index":57,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Testing the Kerr hypothesis beyond the quadrupole with GW241011","primary_cat":"gr-qc","submitted_at":"2026-04-10T18:58:10+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":8.0,"formal_verification":"none","one_line_summary":"GW241011 data shows consistency with Kerr black holes for both quadrupole and octupole moments and delivers the first observational bounds on spin-induced octupole deviations.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"Our analysis employs a suite of complementary param- eterizations, all of which consistently confirm the BBH hypothesis for GW241011, extending and complement- ing earlier tests based solely on the SIQM [25, 56]. These tests are complementary to ringdown-based probes of the Kerr nature of the merger remnant [17, 18], recently ap- plied to GW250114 [57]. While ringdown measurements constrain the properties of the remnant object, inspiral- based tests such as ours provide direct constraints on the nature of the progenitor compact objects. As GW detector sensitivities continue to improve, the growing population of GW241011-like systems will en- able increasingly stringent tests of the BBH nature of"},{"citing_arxiv_id":"2604.07388","ref_index":56,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"GW190711_030756 and GW200114_020818: astrophysical interpretation of two asymmetric binary black hole mergers in the IAS catalog","primary_cat":"astro-ph.HE","submitted_at":"2026-04-08T05:45:02+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":4.0,"formal_verification":"none","one_line_summary":"Two asymmetric BBH mergers are characterized with mass ratios 0.35 and ≤0.20; one shows high spins, negative χ_eff, and strong precession, suggesting an emerging population of massive rapidly spinning systems.","context_count":1,"top_context_role":"dataset","top_context_polarity":"use_dataset","context_text":"GW190521_030229 [53] and GW231123_135430 [ 55] pro- vide evidence for the existence of intermediate-mass black holes, with inferred total masses of approximately 150 M⊙ and 230 M⊙, respectively. The event GW231123_135430 [55] is also notable as an outlier due to both black holes being in- ferred to be highly spinning. More recent candidates, such as GW241011_065126 and GW241110_043853 [ 56], have been hypothesized to form through hierarchical merger scenar- ios, with GW241011_065126 also inferred to possess negative spins, similar to GW191109_010717 [7, 52]. The current GW catalog further includes GW250114_082203 [ 57], an event with an unusually high SNR of approximately 76, enabling some of the most stringent tests to date of Hawking's area law"},{"citing_arxiv_id":"2604.04546","ref_index":74,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Recoil kicks from binary black hole mergers in GWTC catalogs: implications for retention and hierarchical mergers","primary_cat":"astro-ph.HE","submitted_at":"2026-04-06T09:13:33+00:00","verdict":null,"verdict_confidence":null,"novelty_score":null,"formal_verification":null,"one_line_summary":null,"context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"In this paper, we present recoil kick velocity estimates for all events reported up to the GWTC-4 catalog [67-71] using a consistent analysis framework. In addition, we compute re- coil velocities for the 12 LVK intermediate-mass black hole (IMBH) candidates presented in Ref. [72] and subsequently an- alyzed in Ref. [73]. Finally, we include the recently announced events GW241011_233834 [ 74], GW241110_124123 [ 74], and GW250114_082203 [ 75] from the ongoing second leg of the fourth observing run of the LVK collaboration in our analysis, bringing the total number of events and candidates considered to 183. We provide the details of the recoil model in Section II. In the following sections, we present the inferred kick veloci- ties (Section III), and discuss their astrophysical implications"},{"citing_arxiv_id":"2601.18835","ref_index":14,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Beyond FINDCHIRP: Breaking the memory wall and optimal FFTs for Gravitational-Wave Matched-Filter Searches with Ratio-Filter Dechirping","primary_cat":"astro-ph.IM","submitted_at":"2026-01-25T20:45:48+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":7.0,"formal_verification":"none","one_line_summary":"Ratio-Filter Dechirping converts gravitational-wave matched filtering from a memory-bound FFT into a cache-efficient FIR convolution, delivering a measured 8x speedup in the core loop.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2601.14979","ref_index":24,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"The relativistic restricted three-body problem: geometry and motion around tidally perturbed black holes","primary_cat":"gr-qc","submitted_at":"2026-01-21T13:27:47+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":6.0,"formal_verification":"none","one_line_summary":"Increasing tidal deformation around a black hole drives bound geodesics through weak chaos, plunging, unbinding, and eventual depletion of all bound motion, with semi-analytic critical amplitudes for each transition.","context_count":1,"top_context_role":"background","top_context_polarity":"unclear","context_text":"Landry and E. Poisson, Phys. Rev. D91, 104018 (2015), arXiv:1503.07366 [gr-qc]. [20] P. Pani, L. Gualtieri, A. Maselli, and V. Ferrari, Phys. Rev. D92, 024010 (2015), arXiv:1503.07365 [gr-qc]. [21] D. C. Robinson, Phys. Rev. Lett.34, 905 (1975). [22] B. Carter, Phys. Rev. Lett.26, 331 (1971). [23] S. W. Hawking, Commun. Math. Phys.25, 152 (1972). [24] J. D. Bekenstein, in2nd International Sakharov Con- ference on Physics(1996) pp. 216-219, arXiv:gr- qc/9605059. [25] B. Carter, in8th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories (MG 8)(1997) pp. 136-155, arXiv:gr-qc/9712038. [26] P. T. Chrusciel, J."},{"citing_arxiv_id":"2601.07908","ref_index":43,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Signatures of a subpopulation of hierarchical mergers in the GWTC-4 gravitational-wave dataset","primary_cat":"gr-qc","submitted_at":"2026-01-12T19:00:00+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":6.0,"formal_verification":"none","one_line_summary":"GWTC-4 data show a transition to nearly all hierarchical mergers above 46 solar masses, with the hierarchical rate peaking at 15.7 solar masses, indicating mass-dependent substructure in black hole spins.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"assumptions for binary star evolution [42]. To disentangle hierarchical mergers from first- generation counterparts, it is useful to look in parame- ters that are both well-measured and in which we expect distinct behavior. The rapid spins, unequal mass ratios, and/or high masses of several individual events-namely, GW190521 [11], GW231123 [14] and GW241011 [43]- have led to their interpretation as hierarchical merg- ers [25, 44-47], though non-hierarchical interpretations have also been put forward [e.g. 24, 48-53]. However, data quality issues and waveform inaccuracies can in- troduce systematic biases in measurements of individual systems, including their spins [14, 54-57]. When per- arXiv:2601.07908v1 [gr-qc] 12 Jan 2026"}],"limit":50,"offset":0}