Results 31 to 40 of about 837,700 (191)
Stellar ages through the corners of the boxy bulge [PDF]
Astronomy & Astrophysics, 2013 10 pages, 10 figures, accepted for publication on A& ...
Valenti, E. +7 more
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Using the Gaia Excess Uncertainty as a Proxy for Stellar Variability and Age
The Astrophysical Journal, 2023 Stars are known to be more active when they are young, resulting in a strong correlation between age and photometric variability. The amplitude variation between stars of a given age is large, but the age–variability relation becomes strong over large ...
Madyson G. Barber, Andrew W. Mann
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Eclipsing binary stars as tests of stellar evolutionary models and stellar ages
Proceedings of the International Astronomical Union, 2008 AbstractEclipsing binary stars provide highly accurate measurements of the fundamental physical properties of stars. They therefore serve as stringent tests of the predictions of evolutionary models upon which most stellar age determinations are based.
Stassun, Keivan G. +3 more
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Addressing Systematics in the Traceback Age of the β Pictoris Moving Group
The Astrophysical Journal, 2023 We characterize the impact of several sources of systematic errors on the computation of the traceback age of the β Pictoris moving group ( β PMG). We find that uncorrected gravitational redshift and convective blueshift bias absolute radial velocity ...
Dominic Couture +2 more
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Measurement of stellar age from uranium decay [PDF]
Nature, 2001 The ages of the oldest stars in the Galaxy indicate when star formation began, and provide a minimum age for the Universe. Radioactive dating of meteoritic material and stars relies on comparing the present abundance ratios of radioactive and stable nuclear species to the theoretically predicted ratios of their production.
Cayrel, R. +12 more
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A Relationship between Stellar Age and Spot Coverage [PDF]
The Astrophysical Journal, 2020 Abstract We investigate starspot distributions consistent with space-based photometry of F, G, and K stars in six stellar associations ranging in age from 10 Myr to 4 Gyr. We show that a simple light-curve statistic called the “smoothed amplitude” is proportional to stellar age as t −1/2, following a Skumanich-like spin-
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Confronting substellar theoretical models with stellar ages [PDF]
Proceedings of the International Astronomical Union, 2008 AbstractBy definition, brown dwarfs never reach the main-sequence, cooling and dimming over their entire lifetime, thus making substellar models challenging to test because of the strong dependence on age. Currently, most brown dwarfs with independently determined ages are companions to nearby stars, so stellar ages are at the heart of the effort to ...
Dupuy, Trent J. +2 more
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The Ages of Galactic Bulge Stars with Realistic Uncertainties
The Astrophysical Journal, 2023 Using modern isochrones with customized physics and carefully considered statistical techniques, we recompute the age distribution for a sample of 91 microlensed dwarfs in the Galactic bulge presented by Bensby et al.
Meridith Joyce +5 more
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Internal kinematics of stellar populations in Terzan 5 [PDF]
, 2022 openGlobular clusters are stellar systems populated by up to millions of old stars very tightly gravitationally bound. Their absolute ages provide lower limits to the age of the Galactic bulge and the Universe, that can be compared with the one obtained ...
MAGLIONE, MARIASOLE
core
Kinematic Age of the β-Pictoris Moving Group
The Astrophysical JournalAccurate age estimation of nearby young moving groups (NYMGs) is important as they serve as crucial testbeds in various fields of astrophysics, including the formation and evolution of stars and planets, as well as loose stellar associations.
Jinhee Lee, Inseok Song
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