Spectral evolution and calcium white dwarfs in J-PLUS
Gänsicke, B. T.; Carrasco, J. M.; Tremblay, P. -E.; Vázquez Ramió, H.; Varela, J.; Ederoclite, A.; Cenarro, A. J.; López-Sanjuan, C.; Marín-Franch, A.; Gentile Fusillo, N. P.; Spinoso, D.
Spain, United Kingdom, China, Germany
Abstract
We complement the Gaia-based catalogue of white dwarfs with the optical photometry from the Javalambre Photometric Local Universe Survey (J-PLUS) DR2, covering $2 176$ deg$^2$ with 12 passbands ($ugriz$ + 7 medium bands). We define a common sample of $5 926$ white dwarfs with $r < 19.5$ mag and derive their effective temperature ($T_{eff})$, surface gravity, mass ($M$), and atmospheric composition (H- {versus} He-dominated). We also estimate the presence of polluting metals with the $J0395$ filter in J-PLUS, sensitive to the calcium H+K absorption. Using this information, we analyse the spectral evolution and the change in the fraction of metal-polluted white dwarfs with effective temperature. Finally, we expand our analysis to the eleven white dwarfs in the miniJPAS area, covered with the 56 medium-band passbands of $14$ nm designed for the Javalambre Physics of the Accelerating Universe Astrophysical Survey (J-PAS).