SIMBAD references

2021ApJS..253...58Q - Astrophys. J., Suppl. Ser., 253, 58-58 (2021/April-0)

Precise ages of field stars from white dwarf companions in Gaia DR2.

QIU D., TIAN H.-J., WANG X.-D., NIE J.-L., VON HIPPEL T., LIU G.-C., FOUESNEAU M. and RIX H.-W.

Abstract (from CDS):

We analyze 4050 wide binary star systems involving a white dwarf (WD) and usually a main-sequence (MS) star, drawn from the large sample assembled by Tian et al. Using the modeling code BASE-9, we determine the system's ages, the WD progenitors' zero-age MS masses, the extinction values (AV), and the distance moduli. Discarding the cases with poor age convergences, we obtain ages for 3551 WDs, with a median age precision of στ/τ = 20%, and system ages typically in the range of 1-6 Gyr. We validated these ages against the very few known clusters and through cross validation of 236 WD-WD binaries. Under the assumption that the components are coeval in a binary system, this provides precise age constraints on the usually low-mass MS companions, mostly inaccessible by any other means.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Stellar ages - Wide binary stars - Field stars - Markov chain Monte Carlo - Bayesian statistics - Main sequence stars - White dwarf stars - Zero-age main sequence stars - Stellar evolutionary tracks - Initial mass function - Photometry

VizieR on-line data: <Available at CDS (J/ApJS/253/58): table2.dat table4.dat>

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 17

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