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How accurate are stellar ages based on stellar models? [PDF]
EAS Publications Series, 2014 83 pages, 46 figures, contribution to the proceedings of the 13rd Evry Schatzman School on Stellar Astrophysics, "The Ages of Stars", Roscoff 2013, EAS Publications Series, eds. Y. Lebreton, D.
Lebreton, Yveline +2 more
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Stellar ages from stellar rotation [PDF]
Proceedings of the International Astronomical Union, 2008 AbstractOur ability to determine stellar ages from measurements of stellar rotation, hinges on how well we can measure the dependence of rotation on age for stars of different masses. Rotation periods for stars in open clusters are essential to determine the relations between stellar age, rotation, and mass.
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Stellar ages from asteroseismology [PDF]
Proceedings of the International Astronomical Union, 2008 AbstractAsteroseismology has been recognized for a long time as a very powerful mean to probe stellar interiors. The oscillations frequencies are closely related to stellar internal structure properties via the density and the sound speed profiles. Since these properties are in turn tightly linked with the mass and evolutionary state, we can expect to ...
Lebreton, Yveline +3 more
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The Stellar Ages of Elliptical Galaxies [PDF]
Astrophysics and Space Science, 1995 Integrated broad-band colors and metallic lines cannot discriminate clearly between the effects of age and Z in old stellar populations. Such data are more sensitive to Z than to age. The Hβ feature provides a way to break this degeneracy. New measurements indicate that the mean stellar ages of typical E galaxy nuclei are fairly young, ranging from 2 ...
Faber, S. M. +3 more
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The Stellar Disk Component: Distribution, Motions, Age and Stellar Composition [PDF]
Symposium - International Astronomical Union, 1985 The distribution of the stellar disk component is studied with particular emphasis on the properties of open clusters. A scale height of 80 pc is found for clusters younger than 109years while the scale height is 200 pc for older clusters. A radial metallicity gradient in the disk is confirmed but there seem to be significant abundance variations apart
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Stellar Seismology, Stellar Ages and the Cosmological Constant
, 2001 Solar seismology has allowed precision measurements of both the static and dynamic structure of our local star, the Sun. In the near future, seismology of solar-like stars of different ages and masses, necessarily restricted by angular resolution to low l-modes, will allow studies of the internal structure of stars at various stages of evolution.
Isaak, George R., Isaak, Kate G.
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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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Stellar age determination in the mass–luminosity plane
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT The ages of stars have historically relied on isochrone fitting of standardized grids of models. While these stellar models have provided key constraints on observational samples of massive stars, they inherit many systematic uncertainties, mainly in the internal mixing mechanisms applied throughout the grid, fundamentally ...
Higgins, Erin R., Vink, Jorick S.
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Clusters: Age Scales for Stellar Physics [PDF]
EAS Publications Series, 2016 Ages are key to truly understand a large plethora of astrophysical phenomena. On the other hand, stellar clusters are open windows to understand stellar evolution, specifically, the change with time and mass of different stellar properties. As such, they are our laboratories where different theories can be tested, but without accurate ages, our ...
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Stellar magnetism: empirical trends with age and rotation [PDF]
Monthly Notices of the Royal Astronomical Society, 2014 15 pages, 7 figures.
Vidotto, A. A. +14 more
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