SIMBAD references

2020ApJ...898...27S - Astrophys. J., 898, 27-27 (2020/July-3)

BAFFLES: Bayesian ages for field lower-mass stars.


Abstract (from CDS):

Age is a fundamental parameter of stars, yet in many cases, ages of individual stars are presented without robust estimates of the uncertainty. We have developed a Bayesian framework, BAFFLES, to produce the age posterior for a star from its calcium emission strength (log(RHK^′^)) or lithium abundance (Li EW) and B - V color. We empirically determine the likelihood functions for calcium and lithium as functions of age from literature measurements of stars in benchmark clusters with well-determined ages. We use a uniform prior on age, which reflects a uniform star formation rate. The age posteriors we derive for several test cases are consistent with literature ages found from other methods. BAFFLES represents a robust method to determine the age posterior probability distribution for any field star with 0.45 <= B - V <= 0.9 and a measurement of RHK^′^ and/or 0.35 <= B - V <= 1.9 and measured Li EW. We compile colors, RHK^′^, and Li EW from over 2630 nearby field stars from the literature, and present the derived BAFFLES age posterior for each star.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Stellar activity - Stellar ages - Field stars - Bayesian statistics

VizieR on-line data: <Available at CDS (J/ApJ/898/27): table2.dat>

Simbad objects: 2727

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