2012ApJ...755..128Q


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.31CET12:28:23

2012ApJ...755..128Q - Astrophys. J., 755, 128 (2012/August-3)

Wind competing against settling: a coherent model of the GW Virginis instability domain.

QUIRION P.-O., FONTAINE G. and BRASSARD P.

Abstract (from CDS):

We examine in detail the proposition that GW Vir pulsators owe their existence to a residual stellar wind that competes against the settling of the carbon and oxygen atoms which "fuel" pulsational instabilities via their opacity. With cooling, the fading wind progressively loses its capacity to maintain enough of these opaque atoms in the driving region, leading naturally to a red edge where pulsations disappear. We investigate, in particular, the effects of changing the mass-loss law and the initial envelope composition on the position of the red edge in the log g-Teffdiagram. With this approach, we derive a coherent picture of the GW Vir instability domain.

Abstract Copyright:

Journal keyword(s): diffusion - stars: abundances - stars: interiors - stars: oscillations - stars: winds, outflows - white dwarfs

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 - 2020
#notes
1 PG 0122+200 WD* 01 25 22.5118179721 +20 17 56.963251283   16.2   16.9   DOZ.7 102 0
2 PG 1707+427 WD* 17 08 47.6869967260 +42 41 00.558830272   16.18       PG1159 109 0
3 V* IR Peg WD* 21 34 08.2124719240 +06 50 57.662044329   16.15       PG1159 112 0

    Equat.    Gal    SGal    Ecl

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2020.10.31-12:28:23

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