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New white dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 12

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New white dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 12

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Título New white dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 12
Autor Kepler, Souza Oliveira
Pelisoli, Ingrid Domingos
Koester, Detlev
Ourique, Gustavo
Romero, Alejandra Daniela
Reindl, Nicole
Kleinman, Scot James
Eisenstein, Daniel, J.
Valois, Adeilton Dean Marques
Amaral, Larissa Antunes
Abstract We report the discovery of 6576 new spectroscopically confirmed white dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 12. We obtain Teff, log g and mass for hydrogen atmospherewhite dwarf stars (DAs) and helium atmospherewhite dwarf stars (DBs), estimate the calcium/helium abundances for the white dwarf stars with metallic lines (DZs) and carbon/helium for carbon-dominated spectra (DQs). We found one central star of a planetary nebula, one ultracompact helium binary (AM CVn), one oxygen line-dominated white dwarf, 15 hot DO/PG1159s, 12 new cataclysmic variables, 36 magnetic white dwarf stars, 54 DQs, 115 helium-dominated white dwarfs, 148 white dwarf + main-sequence star binaries, 236 metal-polluted white dwarfs, 300 continuum spectra DCs, 230 hot subdwarfs, 2936 new hydrogen-dominated white dwarf stars, and 2675 cool hydrogen-dominated subdwarf stars. We calculate the mass distribution of all 5883 DAs with S/N ≥ 15 in DR12, including the ones in DR7 and DR10, with an average S/N = 26, corrected to the 3D convection scale, and also the distribution after correcting for the observed volume, using 1/Vmax.
Contido em Monthly notices of the Royal Astronomical Society. Oxford. Vol. 455, no. 4 (Feb. 2016), p. 3413-3423
Assunto Anãs brancas
Catalogos astronomicos
[en] Catalogues
[en] Stars: magnetic field
[en] Subdwarfs
[en] White dwarfs
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/140429
Arquivos Descrição Formato
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