J-PLUS: Spectral evolution of white dwarfs by PDF analysis

Abstract

We estimated the spectral evolution of white dwarfs with effective temperature using the Javalambre Photometric Local Universe Survey (J-PLUS) second data release (DR2), that provides twelve photometric optical passbands over 2176 deg2. We analysed 5926 white dwarfs with r <= 19.5 mag in common between a white dwarf catalog defined from Gaia EDR3 and J-PLUS DR2. We performed a Bayesian analysis by comparing the observed J-PLUS photometry with theoretical models of hydrogen (H) and helium (He) dominated atmospheres. We estimated the PDF for effective temperature (Teff), surface gravity, parallax, and spectral type; and the probability of having a H-dominated atmosphere (pH) for each source. We applied a prior in parallax, using Gaia EDR3 measurements as reference, and derived a self-consistent prior for the atmospheric composition as a function of Teff. We described the fraction of He-dominated atmosphere white dwarfs (fHe) with a linear function of Teff at 5000 < Teff < 30000 K. We found fHe = 0.24 +- 0.01 at Teff = 10000 K, a change rate along the cooling sequence of 0.14 +- 0.02 per 10 kK, and a minimum He-dominated fraction of 0.08 +- 0.02 at the high-temperature end. We tested the obtained pH by comparison with spectroscopic classifications, finding that it is reliable. We estimated the mass distribution for the 351 sources with distance d < 100 pc, mass M > 0.45 Msun, and Teff > 6000 K. The result for H-dominated white dwarfs agrees with previous work, with a dominant M = 0.59 Msun peak and the presence of an excess at M ~ 0.8 Msun. This high-mass excess is absent in the He-dominated distribution, which presents a single peak. The J-PLUS optical data provides a reliable statistical classification of white dwarfs into H- and He-dominated atmospheres. We find a 21 +- 3 % increase in the fraction of He-dominated white dwarfs from Teff = 20000 K to Teff = 5000 K.

Published in Astronomy and Astrophysics. 18 pages, 15 figures, 4 tables

References in corpus (19)

• The Gaia mission
• A catalogue of white dwarfs in Gaia EDR3
• On the Spectral Evolution of Hot White Dwarf Stars. I. A Detailed Model-Atmosphere Analysis of Hot White Dwarfs from SDSS DR12
• Super and massive AGB stars - IV. Final fates - Initial to final mass relation
• On the Measurement of Fundamental Parameters of White Dwarfs in the Gaia Era
• The 100 pc White Dwarf Sample in the SDSS Footprint
• White dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 14
• $Gaia$ white dwarfs within 40 pc II: the volume-limited northern hemisphere sample
• The Ratio of Helium- to Hydrogen-Atmosphere White Dwarfs: Direct Evidence for Convective Mixing
• A New Generation of Cool White Dwarf Atmosphere Models. IV. Revisiting the Spectral Evolution of Cool White Dwarfs
• Hot DB White Dwarfs from the Sloan Digital Sky Survey
• $\text{Gaia}$ white dwarfs within 40 pc I: spectroscopic observations of new candidates
• The Parallax Zero-Point of Gaia Early Data Release 3 from LAMOST Primary Red Clump Stars
• From Hydrogen to Helium: The Spectral Evolution of White Dwarfs as Evidence for Convective Mixing
• 3D spectroscopic analysis of helium-line white dwarfs
• A Deep Proper Motion Catalog Within the Sloan Digital Sky Survey Footprint. II. The White Dwarf Luminosity Function
• Calibration of the mixing length theory for structures of helium-dominated atmosphere white dwarfs
• Cool white dwarfs as standards for infrared observations
• Probing the structure of Kepler ZZ Ceti stars with full evolutionary models-based asteroseismology

Cited by in corpus (19)

• Current challenges in the physics of white dwarf stars
• Gaia Data Release 3: The Galaxy in your preferred colours. Synthetic photometry from Gaia low-resolution spectra
• The 40 pc sample of white dwarfs from Gaia
• Spectral classification of the 100 pc white dwarf population from Gaia-DR3 and the Virtual Observatory
• A Spectro-photometric Analysis of Cool White Dwarfs in the Gaia and Pan-STARRS Footprint
• Spectral analysis of ultra-cool white dwarfs polluted by planetary debris
• The spectral evolution of white dwarfs: where do we stand?
• Local stellar formation history from the 40 pc white dwarf sample
• Carbon dredge-up required to explain the Gaia white dwarf colour-magnitude bifurcation
• White dwarf spectral type-temperature distribution from Gaia-DR3 and the Virtual Observatory
• On the Spectral Evolution of Hot White Dwarf Stars. IV. The Diffusion and Mixing of Residual Hydrogen in Helium-rich White Dwarfs
• Data-Driven Selection and Spectral Classification of White Dwarf Stars
• A rotating white dwarf shows different compositions on its opposite faces
• The ubiquity of carbon dredge-up in hydrogen-deficient white dwarfs as revealed by GALEX
• The miniJPAS survey: White dwarf science with 56 optical filters
• An Unsupervised Machine Learning Approach to Identify Spectral Energy Distribution Outliers: Application to the S-PLUS DR4 data
• Spatially resolved stellar populations and emission lines properties in nearby galaxies with J-PLUS -- I. Method and first results for the M101 group
• J-PLUS: The fraction of calcium white dwarfs along the cooling sequence
• J-PLUS: Understanding outlier white dwarfs in the third data release via dimensionality reduction