Results 21 to 30 of about 837,700 (191)
Lithium Depletion Boundary Ages of Young Planet-Hosting Stellar Associations [PDF]
, 2023 Stellar associations - groups of coeval, co-moving stars - are fundamental to our understanding of stellar ages and critical for the study of stellar and planetary evolution.
Wood, Mackenna
core +1 more source
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
openaire +1 more source
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.
openaire +2 more sources
The Astronomical Journal, 2023 We report the discovery and characterization of a nearby (∼85 pc), older (27 ± 3 Myr), distributed stellar population near Lower Centaurus Crux (LCC), initially identified by searching for stars comoving with a candidate transiting planet from TESS (HD ...
Mackenna L. Wood +37 more
doaj +1 more source
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.
openaire +2 more sources
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 ...
openaire +2 more sources
THE AGE AND STELLAR PARAMETERS OF THE PROCYON BINARY SYSTEM [PDF]
The Astrophysical Journal, 2013 Accepted for the Astrophysical Journal, in ...
Liebert, James +4 more
openaire +2 more sources
Frontiers in Astronomy and Space Sciences, 2017 We present the galactic stellar age—velocity dispersion relation obtained from a semi-analytic model of galaxy formation. We divide galaxies into two populations: galaxies which have over-massive/under-massive black holes (BHs) against the best-fitting ...
Hikari Shirakata +3 more
doaj +1 more source
Wrinkles in Time. I. Rapid Rotators Found in High-eccentricity Orbits
The Astrophysical Journal, 2023 Recent space-based missions have ushered in a new era of observational astronomy, where high-cadence photometric light curves for thousands to millions of stars in the solar neighborhood can be used to test and apply stellar age-dating methods, including
Rayna Rampalli +4 more
doaj +1 more source
Towards age/rotation/magnetic activity relation with seismology
EPJ Web of Conferences, 2015 The knowledge of stellar ages directly impacts the characterization of a planetary system as it puts strong constraints on the moment when the system was born. Unfortunately, the determination of precise stellar ages is a very difficult task.
Mathur Savita
doaj +1 more source