2003A&A...406..657W

Query : 2003A&A...406..657W

2003A&A...406..657W - Astronomy and Astrophysics, volume 406657-666 (2003/8-1)

Numerical simulations of the pulsating DB white dwarf GD 358.

WEIDNER C. and KOESTER D.

Abstract (from CDS):

The numerical simulation method for variable white dwarfs of Ising & Koester (2001A&A...374..116I) is extended to variable DB stars (DBVs or V777 Herculis stars). We find the same general behavior of nonlinear effects, with a sinusoidal light-curve at small amplitudes, strongly non-sinusoidal variations at intermediate amplitudes and a change back to smaller and sinusoidal variations at the largest driving pressure amplitudes. The transition between the various regimes is however shifted to higher amplitudes compared to DAVs because of the smoother reaction of the DB convection zones to perturbations. A peculiar event of the prototype GD358 - with all pulsation power going into one mode only - in August 1996 offers the possibility for a direct comparison of the light-curve with our simulation. We can reproduce the light-curve, but only for higher effective temperature than usually assumed. The wavelength dependent amplitudes (chromatic amplitudes) of this object are not well reproduced by our simulations, and various possible explanations are discussed.

Abstract Copyright: ∼

Journal keyword(s): stars: white dwarfs - stars: atmospheres - stars: interiors - convection - stars: variables: general

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 GD 358 WD* 16 47 18.3925183824 +32 28 32.862804384 12.511 13.530 13.653 13.752 13.852 DB2 364 0

Query : 2003A&A...406..657W

Basic data :
GD 358 -- White Dwarf
Other object types: otypes_help 		* (GD,ASCC,...), WD* (1969ApJ,EGGR,...), PM* (2018yCat,LSPM,...), Pu* (2012A&A), UV (GALEX,KUV,...), WD? (2018MNRAS), V* (1SWASP,V*), Opt (LAMOST,SDSS), NIR (2MASS)
ICRS coord. (ep=J2000) : 		16 47 18.3925183824 +32 28 32.862804384 (Optical) [ 0.0180 0.0212 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		16 45 25.6573222456 +32 33 47.968466886 [ 0.0180 0.0212 90 ]
Gal coord. (ep=J2000) : 		054.0752202280984 +39.1905995919506 [ 0.0180 0.0212 90 ]
Proper motions mas/yr : 		-158.955 25.438 [0.024 0.032 90] A 2020yCat.1350....0G
Parallaxes (mas): 		23.2441 [0.024] A 2020yCat.1350....0G
Spectral type: 		DB2 C 1986ApJS...61..305G
Fluxes (14) :
U 12.511 [0.0078] B 2013AJ....146..131L
B 13.530 [0.0088] B 2013AJ....146..131L
V 13.653 [0.0095] B 2013AJ....146..131L
R 13.752 [0.0086] B 2013AJ....146..131L
G 13.579940 [0.003138] C 2020yCat.1350....0G
I 13.852 [0.0081] B 2013AJ....146..131L
J 14.128 [0.028] C 2003yCat.2246....0C
H 14.206 [0.048] C 2003yCat.2246....0C
K 14.414 [0.097] C 2003yCat.2246....0C
u (AB) 14.076 [0.008] C 2015ApJS..219...12A
g (AB) 13.679 [0.003] C 2015ApJS..219...12A
r (AB) 15.653 [0.013] C 2015ApJS..219...12A
i (AB) 14.604 [0.006] C 2015ApJS..219...12A
z (AB) 14.584 [0.006] C 2015ApJS..219...12A
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Identifiers (30) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

GD 358 LAMOST J164718.38+322832.8 1SWASP J164718.40+322833.0 V* V777 Her
ASCC 595989 LSPM J1647+3228 TIC 219074038 WD 1645+32
EGGR 239 2MASS J16471839+3228328 UBV M 43078 WD 1645+325
GALEX J164718.4+322831 PG 1645+326 UCAC2 43112556 [TFW97] J164718.49+322832.62
GEN# +6.10060358 PLX 3821.01 UCAC4 613-056335 Gaia DR3 1314045729544380288
KUV 16454+3234 PM J16473+3228 USNO-B1.0 1224-00338947 Gaia DR2 1314045729544380288
KUV 433-8 SDSS J164718.37+322833.0 USNO 638
LAMOST J164718.35+322832.9 SDSS J164718.36+322832.9 uvby98 610060358 V

References (364 between 1850 and 2026) (Total 364)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Distance : 4    Var : 1    Fe/H : 4    Plx : 3    PM : 4    SpT : 13   

   

Observing logs
IUE : 20   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : GD 358

Link by name to the catalogue in VizieR :

GALEX J164718.4+322831 LSPM J1647+3228 2MASS J16471839+3228328 PG 1645+326 SDSS J164718.37+322833.0
SDSS J164718.36+322832.9 UCAC2 43112556 UCAC4 613-056335 USNO-B1.0 1224-00338947 uvby98 610060358 V
V* V777 Her WD 1645+32 WD 1645+325 Gaia DR3 1314045729544380288 Gaia DR2 1314045729544380288

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