Spectral classification of the 100 pc white dwarf population from Gaia-DR3 and the virtual observatory

• DOI: 10.1093/mnras/stac3382
• Publication Date: 2022-11-25T01:31:15Z
• Authors: F M Jiménez-Esteban; S Torres; A Rebassa-Mansergas; P Cruz; R Murillo-Ojeda; E Solano; C Rodrigo; M E Camisassa
• Keywords: Astrometry; Spectral energy distribution

ABSTRACT The third data release of Gaia has provided low-resolution spectra for ∼100 000 white dwarfs (WDs) that, together with the excellent photometry and astrometry, represent an unrivalled benchmark study this population. In work, we first built a highly complete volume-limited sample consisting in 12 718 WDs within 100 pc from Sun. use Virtual Observatory Spectral energy distribution Analyzer tool allowed us to perform automated fitting their spectral distributions different atmospheric models. particular, spectrally derived Javalambre-Physics Accelerating Universe Astrophysical Survey led classification DA non-DA accuracy >90 per cent, tested already spectroscopically labelled objects. performance achieved was extended practically whole population effective temperatures above 5500 K. Our results show that while A branch WD Hertzsprung–Russell diagram is populated by WDs, B largely formed non-DAs (65 cent). remaining 35 cent DAs implies second peak at ∼0.8 M⊙ mass distribution. Additionally, Q its extension lower can be observed both objects due core crystallization. Finally, detailed evolution function, which confirms slow increase fraction as temperature decreases down 10 500 K, where it reaches maximum 36 then ∼31 cent.