An Initial Survey of White Dwarfs in the Sloan Digital Sky Survey | Zendy

Hugh C. Harris | Zendy; James Liebert | Zendy; S. J. Kleinman | Zendy; A. Nitta | Zendy; Scott F. Anderson | Zendy; G. R. Knapp | Zendy; Jurek Krzesiski | Zendy; Gary D. Schmidt | Zendy; Michael A. Strauss | Zendy; Dan Vanden Berk | Zendy; Daniel J. Eisenstein | Zendy; Suzanne L. Hawley | Zendy; B. Margon | Zendy; Jeffrey A. Munn | Zendy; Nicole M. Silvestri | Zendy; J. A. Smith | Zendy; Paula Szkody | Zendy; Matthew J. Collinge | Zendy; C. C. Dahn | Zendy; Xiaohui Fan | Zendy; Patrick B. Hall | Zendy; Donald P. Schneider | Zendy; J. Brinkmann | Zendy; Scott Burles | Zendy; James E. Gunn | Zendy; G. S. Hennessy | Zendy; Robert B. Hindsley | Zendy; Zeljko Ivezi | Zendy; S. Kent | Zendy; Donald Q. Lamb | Zendy; Robert H. Lupton | Zendy; R. C. Nichol | Zendy; Jeffrey R. Pier | Zendy; David J. Schlegel | Zendy; Mark SubbaRao | Zendy; Alan Uomoto | Zendy; B. Yanny | Zendy; Donald G. York | Zendy

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An Initial Survey of White Dwarfs in the Sloan Digital Sky Survey

Author(s) -

Hugh C. Harris,

James Liebert,

S. J. Kleinman,

A. Nitta,

Scott F. Anderson,

G. R. Knapp,

Jurek Krzesiski,

Gary D. Schmidt,

Michael A. Strauss,

Dan Vanden Berk,

Daniel J. Eisenstein,

Suzanne L. Hawley,

B. Margon,

Jeffrey A. Munn,

Nicole M. Silvestri,

J. A. Smith,

Paula Szkody,

Matthew J. Collinge,

C. C. Dahn,

Xiaohui Fan,

Patrick B. Hall,

Donald P. Schneider,

J. Brinkmann,

Scott Burles,

James E. Gunn,

G. S. Hennessy,

Robert B. Hindsley,

Zeljko Ivezi,

S. Kent,

Donald Q. Lamb,

Robert H. Lupton,

R. C. Nichol,

Jeffrey R. Pier,

David J. Schlegel,

Mark SubbaRao,

Alan Uomoto,

B. Yanny,

Donald G. York

Publication year - 2003

Publication title -

the astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.61

H-Index - 271

eISSN - 1538-3881

pISSN - 0004-6256

DOI - 10.1086/376842

Subject(s) - physics , white dwarf , subdwarf , stars , astrophysics , sky , astronomy , stellar classification , photometry (optics) , spectral line , k type main sequence star , t tauri star

An initial assessment is made of white dwarf and hot subdwarf stars observedin the Sloan Digital Sky Survey. In a small area of sky (190 square degrees),observed much like the full survey will be, 269 white dwarfs and 56 hotsubdwarfs are identified spectroscopically where only 44 white dwarfs and 5 hotsubdwarfs were known previously. Most are ordinary DA (hydrogen atmosphere) andDB (helium) types. In addition, in the full survey to date, a number of WDshave been found with uncommon spectral types. Among these are blue DQ starsdisplaying lines of atomic carbon; red DQ stars showing molecular bands of C_2with a wide variety of strengths; DZ stars where Ca and occasionally Mg, Na,and/or Fe lines are detected; and magnetic WDs with a wide range of magneticfield strengths in DA, DB, DQ, and (probably) DZ spectral types. Photometryalone allows identification of stars hotter than 12000 K, and the density ofthese stars for 15

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