2004A&A...428..159C


Query : 2004A&A...428..159C

2004A&A...428..159C - Astronomy and Astrophysics, volume 428, 159-170 (2004/12-2)

The rate of period change in pulsating DB white dwarf stars.

CORSICO A.H. and ALTHAUS L.G.

Abstract (from CDS):

In this work, we present the theoretically expected rates of pulsation period change for V777 Her (DBV) variable stars. To this end we employ new evolutionary models representative of pulsating DB white dwarf stars computed in a self-consistent way with the predictions of time-dependent element diffusion. At the hot edge of the DB instability strip, the envelopes of the models are characterized by a diffusion-induced double-layered chemical structure. We compute the numerical values of rates of period change by solving the equations of linear, adiabatic, nonradial stellar oscillations. We examine the effects of varying the stellar mass, the mass of the helium envelope and the neutrino emission on the expected period changes. We present extensive tabulations of our results which could be useful for comparison with future detections of the rate of period change in pulsating DB white dwarfs.

Abstract Copyright:

Journal keyword(s): dense matter - stars: evolution - stars: white dwarfs - stars: oscillations

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* ZZ Cet WD* 01 36 13.6155835488 -11 20 32.631811638   14.328 14.16 14.4   DA4.0 265 0
2 V* RY LMi WD* 09 24 15.2484202569 +35 16 51.400826911   15.72   15.99   DA4 252 0
3 V* GW Vir WD* 12 01 45.9728868857 -03 45 40.627851273   14.87 15.04     DOQZ1 470 0
4 GD 358 WD* 16 47 18.3926893312 +32 28 32.865420612 12.511 13.530 13.653 13.752 13.852 DB2 324 0
5 V* QU Tel WD* 20 09 40.1876131002 -52 25 15.865114037 14.51 15.25 15.03     DB2 49 0

    Equat.    Gal    SGal    Ecl

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2021.07.29-18:37:28

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