White dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 14

Abstract

White dwarfs carry information on the structure and evolution of the Galaxy, especially through their luminosity function and initial-to-final mass relation. Very cool white dwarfs provide insight into the early ages of each population. Examining the spectra of all stars with $3\sigma$ proper motion in the Sloan Digital Sky Survey Data Release 14, we report the classification for 20 088 spectroscopically confirmed white dwarfs, plus 415 hot subdwarfs, and 311 cataclysmic variables. We obtain Teff, log g and mass for hydrogen atmosphere white dwarf stars (DAs), warm helium atmosphere white dwarfs (DBs), hot subdwarfs (sdBs and sdOs), and estimate photometric Teff for white dwarf stars with continuum spectra (DCs). We find 15793 sdAs and 447 dCs between the white dwarf cooling sequence and the main sequence, especially below Teff= 10000 K; most are likely low-mass metal-poor main sequence stars, but some could be the result of interacting binary evolution.

18 pages, 13 figures

References in corpus (18)

• The SEGUE Stellar Parameter Pipeline. I. Description and Initial Validation Tests
• The frequency of planetary debris around young white dwarfs
• The SEGUE Stellar Parameter Pipeline. II. Validation with Galactic Globular and Open Clusters
• Super and massive AGB stars - IV. Final fates - Initial to final mass relation
• New white dwarf stars in the Sloan Digital Sky Survey Data Release 10
• The SEGUE Stellar Parameter Pipeline. III. Comparison with High-Resolution Spectroscopy of SDSS/SEGUE Field Stars
• Hot subdwarfs from the ESO Supernova Ia Progenitor Survey: II. Atmospheric parameters of subdwarf O stars
• RR-Lyrae-type pulsations from a 0.26-solar-mass star in a binary system
• White dwarf evolutionary sequences for low-metallicity progenitors: The impact of third dredge-up
• The Future is Now: the Formation of Single Low Mass White Dwarfs in the Solar Neighborhood
• Abundance studies of sdB stars using UV echelle HST/STIS spectroscopy
• White Dwarf Cosmochronology in the Solar Neighborhood
• Precise Atmospheric Parameters for the Shortest Period Binary White Dwarfs: Gravitational Waves, Metals, and Pulsations
• The catalogue of radial velocity variable hot subluminous stars from the MUCHFUSS project
• WASP 1628+10 - an EL CVn-type binary with a very-low-mass stripped-red-giant star and multi-periodic pulsations
• On helium-dominated stellar evolution: the mysterious role of the O(He)-type stars
• Analysis of cool DO-type white dwarfs from the Sloan Digital Sky Survey Data Release 10
• The sdA problem I: Physical Properties

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