SIMBAD references

1995A&A...295L..17P - Astronomy and Astrophysics, volume 295, L17-19 (1995/3-2)

Non-evolutionary secular period increase in pulsating DA white dwarfs.


Abstract (from CDS):

We show that the proper motion of a pulsating white dwarf results in a secular change of the radial velocity of the star and consequently contributes to the observed dP/dt. The proper motion term is always positive and for a typical DAV white dwarf it is of the order of 10–14-10–15s.s–1. This effect is thus comparable with the expected evolutionary period change in these stars due to their cooling, which also produces a positive period derivative, and has to be taken into account when the intrinsic dP/dt is to be properly determined from the observed period change

Abstract Copyright:

Journal keyword(s): stars: kinematics - stars: oscillations - white dwarfs

Simbad objects: 11

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