2004A&A...427..923C


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET02:37:41

2004A&A...427..923C - Astronomy and Astrophysics, volume 427, 923-932 (2004/12-1)

Pulsations of massive ZZ Ceti stars with carbon/oxygen and oxygen/neon cores.

CORSICO A.H., GARCIA-BERRO E., ALTHAUS L.G. and ISERN J.

Abstract (from CDS):

We explore the adiabatic pulsational properties of massive white dwarf stars with hydrogen-rich envelopes and oxygen/neon and carbon/oxygen cores. To this end, we compute the cooling of massive white dwarf models for both core compositions taking into account the evolutionary history of the progenitor stars and the chemical evolution caused by time-dependent element diffusion. In particular, for the oxygen/neon models we adopt the chemical profile resulting from repeated carbon-burning shell flashes expected in very massive white dwarf progenitors. For carbon/oxygen white dwarfs we consider the chemical profiles resulting from phase separation upon crystallization. For both compositions we also take into account the effects of crystallization on the oscillation eigenmodes. We find that the pulsational properties of oxygen/neon white dwarfs are noticeably different from those made of carbon/oxygen, thus making asteroseismological techniques a promising way to distinguish between the two types of stars and, hence, to obtain valuable information about their progenitors.

Abstract Copyright:

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

Simbad objects: 5

goto Full paper

goto View the reference in ADS

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* CL Oct WD* 03 17 15.8451763319 -85 32 25.561178526   13.78 13.66 15.19   DAP 148 1
2 LB 9802 WD* 03 17 19.1281232921 -85 32 31.288417104   13.78 13.66 14.43   DA 125 1
3 WG 22 WD* 12 38 49.7813250074 -49 48 00.218655097   14.14 13.96     DA4.2 209 0
4 PG 1658+441 WD* 16 59 48.4241733860 +44 01 04.041324412   14.3 14.6     DAP1.6 133 0
5 PB 8040 WD* 23 52 31.9204879950 -02 53 11.750081679   17.1 16.99 17.1   DA4.7 30 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2004A&A...427..923C and select 'bookmark this link' or equivalent in the popup menu


2021.02.26-02:37:41

© Université de Strasbourg/CNRS

    • Contact