BONNSAI: a Bayesian tool for comparing stars with stellar evolution models [PDF]
, 2014 Powerful telescopes equipped with multi-fibre or integral field spectrographs combined with detailed models of stellar atmospheres and automated fitting techniques allow for the analysis of large number of stars.
Brott, Ines +5 more
core +3 more sources
A method to estimate stellar ages from kinematical data [PDF]
, 2018 We present a method to build a probability density function (pdf) for the age of a star based on its peculiar velocities $U$, $V$ and $W$ and its orbital eccentricity.
F. Almeida-Fernandes, H. Rocha-Pinto
semanticscholar +1 more source
MINOR MERGERS OR PROGENITOR BIAS? THE STELLAR AGES OF SMALL AND LARGE QUENCHED GALAXIES [PDF]
, 2016 We investigate the origin of the evolution of the population-averaged size of quenched galaxies (QGs) through a spectroscopic analysis of their stellar ages.
Martina Fagioli +5 more
semanticscholar +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
StarHorse : a Bayesian tool for determining stellar masses, ages, distances, and extinctions for field stars [PDF]
, 2017 Understanding the formation and evolution of our Galaxy requires accurate distances, ages and chemistry for large populations of field stars. Here we present several updates to our spectro-photometric distance code, that can now also be used to estimate ...
A. Queiroz +14 more
semanticscholar +1 more source
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
From Young and Hot to Old and Cold: Comparing White Dwarf Cooling Theory to Main Sequence Stellar Evolution in Open Clusters [PDF]
, 2005 I explore the current ability of both white dwarf cooling theory and main sequence stellar evolution theory to accurately determine stellar population ages by comparing ages derived using both techniques for open clusters ranging from 0.1 to 4 Gyr.
Baraffe I. +9 more
core +3 more sources
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
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
openaire +6 more sources