A Gaia Data Release 2 catalogue of white dwarfs and a comparison with SDSS
2019
We present a catalogue of
white dwarfcandidates selected from the second data release of Gaia (DR2). We used a sample of spectroscopically confirmed
white dwarfsfrom 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
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