Magnetic White Dwarfs from the Sloan Digital Sky Survey: The First Data Release | Zendy

Gary D. Schmidt | Zendy; Hugh C. Harris | Zendy; James Liebert | Zendy; Daniel J. Eisenstein | Zendy; Scott F. Anderson | Zendy; J. Brinkmann | Zendy; Patrick B. Hall | Zendy; Michael Harvanek | Zendy; Suzanne L. Hawley | Zendy; S. J. Kleinman | Zendy; G. R. Knapp | Zendy; J. Krzesiński | Zendy; D. Q. Lamb | Zendy; Dan Long | Zendy; Jeffrey A. Munn | Zendy; Eric H. Neilsen | Zendy; Peter R. Newman | Zendy; A. Nitta | Zendy; David J. Schlegel | Zendy; Donald P. Schneider | Zendy; Nicole M. Silvestri | Zendy; J. A. Smith | Zendy; Stephanie A. Snedden | Zendy; Paula Szkody | Zendy; Dan Vanden Berk | Zendy

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Magnetic White Dwarfs from the Sloan Digital Sky Survey: The First Data Release

Author(s) -

Gary D. Schmidt,

Hugh C. Harris,

James Liebert,

Daniel J. Eisenstein,

Scott F. Anderson,

J. Brinkmann,

Patrick B. Hall,

Michael Harvanek,

Suzanne L. Hawley,

S. J. Kleinman,

G. R. Knapp,

J. Krzesiński,

D. Q. Lamb,

Dan Long,

Jeffrey A. Munn,

Eric H. Neilsen,

Peter R. Newman,

A. Nitta,

David J. Schlegel,

Donald P. Schneider,

Nicole M. Silvestri,

J. A. Smith,

Stephanie A. Snedden,

Paula Szkody,

Dan Vanden Berk

Publication year - 2003

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/377476

Subject(s) - white dwarf , physics , astrophysics , sky , stars , stellar classification , magnetic field , polar , massive compact halo object , main sequence , astronomy , quantum mechanics

Beyond its goals related to the extragalactic universe, the Sloan Digital SkySurvey (SDSS) is an effective tool for identifying stellar objects with unusualspectral energy distributions. Here we report on the 53 new magnetic whitedwarfs discovered during the first two years of the survey, including 38 whosedata are made public in the 1500 square-degree First Data Release. Discoveriesspan the magnitude range 16.3 < 20.5, and based on the recovery rate forpreviously-known magnetic white dwarfs, the completeness of the SDSS appears tobe high for reasonably hot stars with B > 3 MG and g > 15. The new objectsnearly double the total number of known magnetic white dwarfs, and includeexamples with polar field strengths B > 500 MG as well as several with exoticatmospheric compositions. The improved sample statistics and uniformityindicate that the distribution of magnetic white dwarfs has a broad peak in therange ~5-30 MG and a tail extending to nearly 10^9 G. Degenerates with polarfields B > 50 MG are consistent with being descendents of magnetic Ap/Bpmain-sequence stars, but low- and moderate-field magnetic white dwarfs appearto imply another origin. Yet-undetected magnetic F-type stars with convectiveenvelopes that destroy the ordered underlying field are attractive candidates.Comment: 19 pages, 8 figure

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