Roche lobe overflow during gas giant destruction aligns stellar spins with orbits within tens of degrees regardless of starting conditions, offering an observable to differentiate this mechanism from high-eccentricity migration.
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Time Scales for CA II Emission Decay, Rotational Braking, and Lithium Depletion
15 Pith papers cite this work. Polarity classification is still indexing.
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A population-synthesis framework shows rotation and unresolved companions bias isochrone ages by a factor of at least 2 near the ZAMS and by 31% for older A stars, adding ~0.1 solar mass and ~180 Myr random uncertainties.
Dynamo-generated magnetic fields confine the tachocline against radiative spreading in global simulations, with stronger stable stratification producing longer cycles, deeper penetration via skin effect, and better confinement plus interior spin-down transmission.
New California Legacy Survey data confirms stellar activity cycles grow longer and weaker before disappearing, resolving the Sun's apparent outlier status in evolutionary trends.
Three accelerating stars yield one stellar companion at 166 AU, one 45 Jupiter-mass object at ~18 AU, and one 9.5 Jupiter-mass object at 6.4 AU that is 65% likely to be a planet.
Tertiary in EM Boo is A-F type with Teff=7000K; system distance ~300 pc indicates Gaia DR3 underestimates true distance due to multiplicity.
The TESS All-Sky Rotation Survey provides periods for 1,046,317 stars within 500 pc, with an estimated 93% being true rotation periods, and includes a method to correct half-period aliases.
CIRs form closer to young fast-rotating solar-mass stars, migrate outward as rotation slows, and produced 10^3 to 10^7 times more energetic particles than today during the Hadean period.
Revised mass of 0.503 M_Earth and radius of 0.736 R_Earth for GJ 367 b give a density of 6.9 g cm^{-3} and an iron fraction of 50-70% via new tidal and composition modeling.
Observational analysis of 85 FGK stars yields X-ray luminosity and temperature relations with age, confirming t^{-1.5} decay in soft band while noting increased scatter in harder band at older ages.
X-ray data show ultra-fast rotating M dwarfs have saturated or enhanced coronal emission, ruling out supersaturation as the cause of their unexpectedly low flaring activity.
Magnetic activity induces frequency shifts that bias asteroseismic age estimates by up to 10% and helium abundance by up to 3% in solar-like stars.
Collates archival stellar activity and rotation data for potential HWO targets, finding measurements for at least 70% of high-interest systems but activity cycles for fewer than 20%.
The HAges catalog compiles published asteroseismic and gyrochronological ages for 659 HWO target stars, finding that only ~5% have asteroseismic ages and ~20% have gyrochronal ages.
citing papers explorer
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Revealing the Origin of Desert Dwellers via Stellar Obliquities
Roche lobe overflow during gas giant destruction aligns stellar spins with orbits within tens of degrees regardless of starting conditions, offering an observable to differentiate this mechanism from high-eccentricity migration.
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Quantifying isochrone-based age uncertainties for rapidly rotating A-type stars
A population-synthesis framework shows rotation and unresolved companions bias isochrone ages by a factor of at least 2 near the ZAMS and by 31% for older A stars, adding ~0.1 solar mass and ~180 Myr random uncertainties.
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A Dynamo Confinement Scenario for the Solar Tachocline and its Implications for Spin-down in the Radiative Spreading Regime
Dynamo-generated magnetic fields confine the tachocline against radiative spreading in global simulations, with stronger stable stratification producing longer cycles, deeper penetration via skin effect, and better confinement plus interior spin-down transmission.
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Stellar Activity Cycles Grow Longer and Weaker Before Disappearing
New California Legacy Survey data confirms stellar activity cycles grow longer and weaker before disappearing, resolving the Sun's apparent outlier status in evolutionary trends.
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Gaia Exoplanet Orbits, Demographics, and Evolution Survey (GEODES): Characteristics of Three Long-Period Companions Accelerating their Host Stars
Three accelerating stars yield one stellar companion at 166 AU, one 45 Jupiter-mass object at ~18 AU, and one 9.5 Jupiter-mass object at 6.4 AU that is 65% likely to be a planet.
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Spectroscopic Disentangling Revealed the Tertiary Component in the Multiple System EM Boo
Tertiary in EM Boo is A-F type with Teff=7000K; system distance ~300 pc indicates Gaia DR3 underestimates true distance due to multiplicity.
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The TESS All-Sky Rotation Survey: Periods for 1,046,317 Stars Within 500 pc
The TESS All-Sky Rotation Survey provides periods for 1,046,317 stars within 500 pc, with an estimated 93% being true rotation periods, and includes a method to correct half-period aliases.
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Corotating Interaction Regions (CIRs): evolution over a solar lifetime
CIRs form closer to young fast-rotating solar-mass stars, migrate outward as rotation slows, and produced 10^3 to 10^7 times more energetic particles than today during the Hadean period.
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Revisiting the Exo-Mercury Candidate GJ 367 b with ESPRESSO and a Self-Consistent Tidal Distortion Model
Revised mass of 0.503 M_Earth and radius of 0.736 R_Earth for GJ 367 b give a density of 6.9 g cm^{-3} and an iron fraction of 50-70% via new tidal and composition modeling.
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X-ray Emission and Stellar Ages of Sun-Like Stars
Observational analysis of 85 FGK stars yields X-ray luminosity and temperature relations with age, confirming t^{-1.5} decay in soft band while noting increased scatter in harder band at older ages.
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The puzzling story of flare inactive ultra fast rotating M dwarfs -- III. Investigating X-ray Activity
X-ray data show ultra-fast rotating M dwarfs have saturated or enhanced coronal emission, ruling out supersaturation as the cause of their unexpectedly low flaring activity.
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Influence of magnetic activity on the determination of stellar parameters through asteroseismology
Magnetic activity induces frequency shifts that bias asteroseismic age estimates by up to 10% and helium abundance by up to 3% in solar-like stars.
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HWO Target Stars and Systems: Activity and Rotation Catalog (ARC) of Potential Target Stars for the Habitable Worlds Observatory
Collates archival stellar activity and rotation data for potential HWO targets, finding measurements for at least 70% of high-interest systems but activity cycles for fewer than 20%.
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The HAges Catalog: Stellar Ages for High Priority HWO Target Stars
The HAges catalog compiles published asteroseismic and gyrochronological ages for 659 HWO target stars, finding that only ~5% have asteroseismic ages and ~20% have gyrochronal ages.
- Formation of extremely low-mass white dwarf binaries undergoing enhanced angular momentum loss