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
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
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
doaj +1 more source
How accurate are stellar ages based on stellar models? II. The impact of asteroseismology [PDF]
, 2014 Accurate and precise stellar ages are best determined for stars which are strongly observationally constrained, that is which are intrinsically oscillating.
Y. Lebreton +5 more
semanticscholar +1 more source
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
doaj +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
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
doaj +1 more source
stardate: Combining dating methods for better stellar ages
Journal of Open Source Software, 2019 Age is the most difficult fundamental stellar property to measure, particularly for stars on the main sequence. These stars change slowly in brightness and temperature, so measuring their ages via placement on the Hertzsprung-Russell or color-magnitude ...
R. Angus, T. Morton, D. Foreman-Mackey
semanticscholar +1 more source
Bayesian isochrone fitting and stellar ages [PDF]
, 2014 Stellar evolution theory has been extraordinarily successful at explaining the different phases under which stars form, evolve and die. While the strongest constraints have traditionally come from binary stars, the advent of asteroseismology is bringing ...
D. Valls-Gabaud
semanticscholar +1 more source
How accurate are stellar ages based on stellar models ? I. The impact of stellar models uncertainties [PDF]
, 2014 Among the various methods used to age-date stars, methods based on stellar model predictions are widely used, for nearly all kind of stars in large ranges of masses, chemical compositions and evolutionary stages.
Yveline Lebreton +5 more
semanticscholar +1 more source