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


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

2003A&A...406..657W - Astronomy and Astrophysics, volume 406, 657-666 (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 - 2022
#notes
1 GD 358 WD* 16 47 18.3925183824 +32 28 32.862804384 12.511 13.530 13.653 13.752 13.852 DB2 334 0

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

Basic data :
GD 358 -- White Dwarf
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types:
* (GD,ASCC,...), WD* (1969ApJ,EGGR,...), PM* (2018yCat,LSPM,...), Pu* (2012A&A), V* (1SWASP,V*), UV (KUV,PG), IR (2MASS)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) :
16 47 18.3925183824 +32 28 32.862804384 (Optical) [ 0.0180 0.0212 90 ] A 2020yCat.1350....0G
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) :
16 45 25.6573222456 +32 33 47.968466886 [ 0.0180 0.0212 90 ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) :
054.0752202280984 +39.1905995919506 [ 0.0180 0.0212 90 ]
Syntax of proper motions is : "pm-ra pm-dec [error ellipse] quality bibcode"
  • pm-ra : mu-ra*cos(dec) (expressed in the ICRS system in mas/yr)
  • pm-dec : mu-dec (expressed in the ICRS system in mas/yr)
  • [error ellipse] : error major axis and minor axis (in mas), orientation angle (in deg)
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the proper motion reference
Proper motions mas/yr :
-158.955 25.438 [0.024 0.032 90] A 2020yCat.1350....0G
Syntax of parallax is : 'value quality [error] bibcode'
  • value : parallax value
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • [error] : mean error
  • bibcode : bibcode of the parallax reference
Parallaxes (mas):
23.2441 [0.024] A 2020yCat.1350....0G
Spectral type is made of 3 parts: %coding is composed of 4 parts :
  • the spectral type, which is made of a temperature class, eventually a luminosity class (roman number) and/or spectral peculiarities;
  • a quality letter: A=best quality→E=worst quality, {� } =unknown quality %
  • a quality letter: A=best quality -> E=worst quality, {� } =unknown quality
  • bibcode : bibcode of the spectral type reference
Spectral type:
DB2 C 1986ApJS...61..305G
Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z
  • (System) : may be AB (default is Vega)
  • flux-value : value of flux or magnitude
  • [error] : error value
  • quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality)
  • MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4])
  • bibcode : bibcode of the flux reference
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
SIMBAD within arcmin
', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay Simbad points in this preview
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within arcsec The VizieR photometry tool allows for easy visualization of photometry points extracted around the Simbad position from photometry-enabled catalogues in VizieR.
The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding.
Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!).
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The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (29) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

GD 358 LSPM J1647+3228 TIC 219074038 WD 1645+32
ASCC 595989 2MASS J16471839+3228328 UBV M 43078 WD 1645+325
EGGR 239 PG 1645+326 UCAC2 43112556 [TFW97] J164718.49+322832.62
GEN# +6.10060358 PLX 3821.01 UCAC4 613-056335 Gaia EDR3 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
LAMOST J164718.38+322832.8 1SWASP J164718.40+322833.0 V* V777 Her

References (334 between 1850 and 2022) (Total 334)
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


distance : 4    Fe_H : 3    PLX : 3    PM : 4    MK : 10   

   

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 :

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 EDR3 1314045729544380288 Gaia DR2 1314045729544380288

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2022.08.10-06:42:17

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