Detection and analysis of photospheric CNO features in the ultraviolet spectrum of the hot DO white dwarf PG 1034 + 001

Journal Article · Wed May 01 04:00:00 EDT 1985 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/163178· OSTI ID:6103763

Sion, E M; Liebert, J; Wesemael, F

An analysis of PG 1034 + 001 extended to include the high-dispersion IUE spectra and the high-resolution optical multiple-mirror telescope echelle spectra is discussed. The observations reveal the presence of absorption lines (C IV at 1548 and 1551 A, N V at 1238 and 1242 A, and O V at 1371 A) from highly ionized species with large redshifts (+ 40-50) km/s) relative to the interstellar lines. The results of a preliminary abundance analysis of the photospheric lines, together with the results of a search of sharp shortward-shifted features are presented. An interpretation of the observed abundances is made in terms of selective radiative forces acting in a high-temperature photosphere. Some speculations on the evolutionary status of DO stars like PG 1034 + 001 are given. 21 references.

• Research Organization: Arizona State Univ., Tempe; Villanova Univ., PA; Steward Observatory, Tucson, AZ
• OSTI ID: 6103763
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 292; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION SPECTRA
ABUNDANCE
ATMOSPHERES
CARBON
DWARF STARS
ELEMENTS
NEBULAE
NITROGEN
NONMETALS
OXYGEN
PLANETARY NEBULAE
SPECTRA
STAR EVOLUTION
STARS
STELLAR ATMOSPHERES
ULTRAVIOLET SPECTRA
VISIBLE SPECTRA
WHITE DWARF STARS