2019MNRAS.482.4570G


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.21CET05:59:31

2019MNRAS.482.4570G - Mon. Not. R. Astron. Soc., 482, 4570-4591 (2019/February-1)

A Gaia Data Release 2 catalogue of white dwarfs and a comparison with SDSS.

GENTILE FUSILLO N.P., TREMBLAY P.-E., GANSICKE B.T., MANSER C.J., CUNNINGHAM T., CUKANOVAITE E., HOLLANDS M., MARSH T., RADDI R., JORDAN S., TOONEN S., GEIER S., BARSTOW M. and CUMMINGS J.D.

Abstract (from CDS):

We present a catalogue of white dwarf candidates selected from the second data release of Gaia (DR2). We used a sample of spectroscopically confirmed white dwarfs from the Sloan Digital Sky Survey (SDSS) to map the entire space spanned by these objects in the Gaia Hertzsprung-Russell diagram. We then defined a set of cuts in absolute magnitude, colour, and a number of Gaia quality flags to remove the majority of contaminating objects. Finally, we adopt a method analogous to the one presented in our earlier SDSS photometric catalogues to calculate a probability of being a white dwarf (PWD) for all Gaia sources that passed the initial selection. The final catalogue is composed of 486 641 stars with calculated PWD from which it is possible to select a sample of ≃260 000 high-confidence white dwarf candidates in the magnitude range 8 < G < 21. By comparing this catalogue with a sample of SDSS white dwarf candidates, we estimate an upper limit in completeness of 85 per cent for white dwarfs with G <= 20 mag and Teff >7000 K, at high Galactic latitudes (|b| > 20°). However, the completeness drops at low Galactic latitudes, and the magnitude limit of the catalogue varies significantly across the sky as a function of Gaia's scanning law. We also provide the list of objects within our sample with available SDSS spectroscopy. We use this spectroscopic sample to characterize the observed structure of the white dwarf distribution in the H-R diagram.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): catalogues - surveys - white dwarfs

VizieR on-line data: <Available at CDS (J/MNRAS/482/4570): gaia2wd.dat gaiasdss.dat>

Status in Simbad:  could be processed

Simbad objects: 11

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Number of rows : 11

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 Wolf 28 WD* 00 49 09.8984116191 +05 23 18.993107442 12.984 12.92 12.374 12.106 11.854 DZ7.5 217 0
2 Wolf 88 WD* 01 48 56.7964000809 +19 02 27.481912783   15.5   15.4   DAZB 37 0
3 GD 17 WD* 01 49 34.3716974862 +24 00 46.528219731   16.12 16.03 16.02   DAZ 12 0
4 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5443 1
5 HE 0330-0002 WD* 03 33 20.3684629702 +00 07 20.654770414   16.8       DBH 20 0
6 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2604 0
7 EGGR 316 WD* 04 40 23.8781162638 +13 58 45.878140655   14.97 14.94 13.25   DB4 58 0
8 SDSS J075227.92+195314.2 WD* 07 52 27.9294440208 +19 53 14.409796002           DH 2 0
9 PG 1225-079 WD* 12 27 47.3585973005 -08 14 37.972964044   14.86 14.74 15.15   DZA4 53 0
10 SBSS 1240+527 WD* 12 42 31.0897330205 +52 26 26.613959095   18.2   18.2   DABZ 20 0
11 GD 362 WD* 17 31 34.3169169136 +37 05 20.709668210   16.3   16.4   DAZB 139 0

    Equat.    Gal    SGal    Ecl

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2020.01.21-05:59:31

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