Absolute far-ultraviolet spectrophotometry of hot subluminous stars from Voyager

Journal Article · Mon Jul 01 00:00:00 EDT 1991 · Astrophysical Journal; (United States)

DOI:https://doi.org/10.1086/170237· OSTI ID:5261902

Holberg, J B; Ali, B; Carone, T E; Polidan, R S ^[1]

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1. Arizona, University, Tucson (USA) NASA, Goddard Space Flight Center, Greenbelt, MD (USA)

Observations, obtained with the Voyager ultraviolet spectrometers, are presented of absolute fluxes for two well-known hot subluminous stars: BD + 28 deg 4211, an sdO, and G191 - B2B, a hot DA white dwarf. Complete absolute energy distributions for these two stars, from the Lyman limit at 912 A to 1 micron, are given. For BD + 28 deg 4211, a single power law closely represents the entire observed energy distribution. For G191 - B2B, a pure hydrogen model atmosphere provides an excellent match to the entire absolute energy distribution. Voyager absolute fluxes are discussed in relation to those reported from various sounding rocket experiments, including a recent rocket observation of BD + 28 deg 4211. 43 refs.

• OSTI ID: 5261902
• Journal Information: Astrophysical Journal; (United States), Vol. 375; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
STARS
ULTRAVIOLET SPECTRA
WHITE DWARF STARS
ENERGY SPECTRA
FAR ULTRAVIOLET RADIATION
STAR MODELS
VOYAGER SPACE PROBES
DWARF STARS
ELECTROMAGNETIC RADIATION
MATHEMATICAL MODELS
RADIATIONS
SPACE VEHICLES
SPECTRA
ULTRAVIOLET RADIATION
VEHICLES
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources