Stellar chronology with white dwarfs in wide binaries

Details Stellar chronology with white dwarfs in wide binaries Stellar chronology with white dwarfs in wide binaries

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009iaus..258..307c&link_type=abstract

The Ages of Stars, Proceedings of the International Astronomical Union, IAU Symposium, Volume 258, p. 307-314

Astronomy and Astrophysics

Astronomy

2

Stars: Low-Mass, Stars: White Dwarfs, Stars: Binaries: Visual, Stars: Activity, Stars: Evolution

Scientific paper

White dwarfs are the evolutionary end product of stars with low and intermediate masses. The evolution of white dwarfs can be understood as a cooling process, which is relatively well known at the moment. For this reason, wide binaries containing white dwarfs are a powerful tool to constrain stellar ages. We have studied several wide binaries containing white dwarfs with two different purposes: when the age of the companion of the white dwarf can be determined with accuracy, we use the binary to improve the knowledge about the white dwarf member. On the contrary, if the companion is a low-mass star with no age indicator available, the white dwarf member itself is used to calibrate the age of the system. In this contribution we present some results using both methodologies to constrain the ages of wide binaries.

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