2002A&A...382..141G


Query : 2002A&A...382..141G

2002A&A...382..141G - Astronomy and Astrophysics, volume 382, 141-151 (2002/1-4)

A nonadiabatic oscillation study of DB white dwarfs.

GAUTSCHY A. and ALTHAUS L.G.

Abstract (from CDS):

A self-consistent abundance diffusion treatment in the evolution of cooling white dwarfs permitted a study of the effect of elemental segregation in nonadiabatic, nonradial stability computations. In particular, mode trapping manifesting itself in cyclically varying period separations behaved differently from its appearance in the damping/excitation rates. Another aspect of the investigation concerned the effect of heavy-element traces in homogeneous DB white-dwarf envelopes on their pulsational instability domain. The stellar models are computed with the CGM convection approach; the study can therefore be considered as a test of its performance in nonradial stability analyses.

Abstract Copyright:

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

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 PG 1654+160 WD* 16 56 57.4672879608 +15 56 27.791267532           DB2 53 0
2 V* QU Tel WD* 20 09 40.1871967824 -52 25 15.864452508 14.51 15.25 15.03     DB2 54 1
3 EGGR 908 WD* 22 48 45.4800657240 +12 20 07.219101336   16.6   16.6   DB4 23 0

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