Computer Science
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984iue..prop.1876r&link_type=abstract
IUE Proposal ID #WDGJR
Computer Science
Scientific paper
Feige 24 is among the hottest nearby white dwarfs, 60,000 - 70,000 K. It is unique among nearby hot white dwarfs in having a close binary companion. Mass estimates based on the mass-radius relation, 0.11 to 0.3 M(sun)), disagree with the mass estimated from the velocity curve of the M dwarf companion, 0.46 to 1.24 M(sun). Sharp absorption lines of C IV, N V and Si IV are found to have low velocity interstellar and high velocity stellar components, Measurement of the white dwarf velocity at an appropriate phase will determine its mass and provide a test of theories of white dwarf structure. The proposed observation will also test the suggestion of Bruhweiler and Kondo that the narrow UV absorption features observed in white atmospheres are blue-shifted due to a stellar wind or formed in static halos about the stars. It will also provide a measurement of the emission from the companion star due to heating by the white dwarf's EUV radiation.
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