A white dwarf catalogue from Gaia-DR2 and the Virtual Observatory

Jiménez Esteban, F. M.
Torres Gil, Santiago
Rebassa Mansergas, Alberto
Skorobogatov, G.
Cantero, C.

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Publication date

January 2018

DOI

10.1093/MNRAS/STY2120

Publisher

Oxford University Press (OUP)

Journal

1365-2966

Abstract

We present a catalogue of 73¿221 white dwarf candidates extracted from the astrometric and photometric data of the recently published Gaia-DR2 catalogue. White dwarfs were selected from the Gaia Hertzsprung–Russell diagram with the aid of the most updated population synthesis simulator. Our analysis shows that Gaia has virtually identified all white dwarfs within 100¿pc from the Sun. Hence, our sub-population of 8555 white dwarfs within this distance limit and the colour range considered, -0.52<(GBP-GRP)<0.80¿, is the largest and most complete volume-limited sample of such objects to date. From this sub-sample, we identified 8343 CO-core and 212 ONe-core white dwarf candidates and derived a white dwarf space density of 4.9±0.4×10-3pc-3¿. A ...