Evolutionary timescale of the pulsating white dwarf G117-B15A : the most stable optical clock known

Thumbnail
View/Open
Date
2000
Author
Type
URI
http://hdl.handle.net/10183/108887
Subject
Abstract
We observe G117-B15A, the most precise optical clock known, to measure the rate of change of the main pulsation period of this blue-edge DAV white dwarf. Even though the obtained value is only within 1 σ, P = (2.3±1.4) x 10 -15 s s-ˡ, it is already constraining the evolutionary timescale of this cooling white dwarf star.
In
The astrophysical journal. Chicago. Vol. 534, no. 2 pt. 2 (May 2000), p. L185-L188
Source
Foreign
Collections
 
   

This item is licensed under a Creative Commons License