2002A&A...393L..45C

Query : 2002A&A...393L..45C

2002A&A...393L..45C - Astronomy and Astrophysics, volume 393L45-48 (2002/10-3)

Discovery of a peculiar DQ white dwarf.

CAROLLO D., HODGKIN S.T., SPAGNA A., SMART R.L., LATTANZI M.G., McLEAN B.J. and PINFIELD D.J.

Abstract (from CDS):

We report the discovery of a new carbon rich white dwarf that was identified during a proper motion survey for cool white dwarfs based on photographic material used for the construction of the Guide Star Catalog II. Its large proper motion (µ≃0.48arcsec/yr) and faint apparent magnitude (V≃18.7) suggest a nearby object of low luminosity. A low-resolution spectrum taken with the William Herschel Telescope clearly shows strong C2 Deslandres-d'Azambuja and Swan bands, which identify the star as a DQ white dwarf. The strength of the Deslandres-d'Azambuja bands and the depression of the continuum in the Swan-band region are signs of enhanced carbon abundance for the given Teff. Comparison of our spectrophotometric data to published synthetic spectra suggests 6000K<Teff<8000K, although further analysis with specialized synthetic models appear necessary to derive both Teff and chemical composition. Finally, the range of spatial velocity estimated for this object makes it a likely member of the halo or thick disk population.

Abstract Copyright: ∼

Journal keyword(s): white dwarfs - stars: carbon - stars: kinematics - stars: individual: GSC2U J131147.2+292348 - astrometry - techniques: spectroscopic

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 OMHR J131148.18+292337.1 WD* 13 11 47.0659076077 +29 23 49.670430735   19.2 18.75 18.03 17.51 DQpec 22 1

Query : 2002A&A...393L..45C

Basic data :
OMHR J131148.18+292337.1 -- White Dwarf
Other object types: otypes_help 		WD* (2013ApJ,WD,...), * (GSC2,USNO,...), PM* (LSPM,LSR), WD? (2021MNRAS), Q? (OMHR), UV (GALEX), Opt (SDSS)
ICRS coord. (ep=J2000) : 		13 11 47.0659076077 +29 23 49.670430735 (Optical) [ 0.1050 0.0812 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		13 09 26.2375447533 +29 39 28.179608955 [ 0.1050 0.0812 90 ]
Gal coord. (ep=J2000) : 		060.9789507995410 +84.9788019003836 [ 0.1050 0.0812 90 ]
Proper motions mas/yr : 		-380.780 326.908 [0.120 0.101 90] A 2020yCat.1350....0G
Parallaxes (mas): 		18.3332 [0.1509] A 2020yCat.1350....0G
Spectral type: 		DQpec D 2006A&A...448..579C
Fluxes (10) :
B 19.2 [~] E 2003AJ....125..984M
V 18.75 [~] E 2001yCat.1271....0S
R 18.03 [1.06] E 2001yCat.1271....0S
G 18.433790 [0.003221] C 2020yCat.1350....0G
I 17.51 [0.33] E 2001yCat.1271....0S
u (AB) 19.659 [0.037] C 2015ApJS..219...12A
g (AB) 19.438 [0.012] C 2015ApJS..219...12A
r (AB) 18.504 [0.008] C 2015ApJS..219...12A
i (AB) 17.927 [0.008] C 2015ApJS..219...12A
z (AB) 17.976 [0.026] C 2015ApJS..219...12A
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Identifiers (14) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

WD 1309+296 GSC2U J131147.2+292348 OMHR J131148.18+292337.1 Gaia DR2 1462641629366243712
GALEX J131147.0+292352 LSPM J1311+2923 SDSS J131146.93+292351.1 Gaia DR3 1462641629366243712
GSC2 N122232118620 LSR J1311+2923 SDSS J131146.94+292351.1
GSC2 N122232112408 OMHR 58793 USNO-B1.0 1193-00206183

References (22 between 1850 and 2026) (Total 22)
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

Velocities : 1    Distance : 2    Fe/H : 3    Plx : 2    PM : 3    SpT : 7   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : OMHR J131148.18+292337.1

Link by name to the catalogue in VizieR :

WD 1309+296 GALEX J131147.0+292352 LSPM J1311+2923 OMHR 58793 OMHR J131148.18+292337.1
SDSS J131146.93+292351.1 SDSS J131146.94+292351.1 USNO-B1.0 1193-00206183 Gaia DR2 1462641629366243712 Gaia DR3 1462641629366243712

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