Energy distributions of symbiotic novae

Journal Article · Fri Feb 01 04:00:00 EST 1991 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/169688· OSTI ID:5867968

Bryan, G L; Kwok, S ^[1]

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1. Calgary Univ. (Canada) Joint Institute for Laboratory Astrophysics, Boulder, CO (USA)

The IRAS low-resolution spectra of three recent symbiotic novae are fitted with a dust continuum radiative transfer model. It is found that the dust shells are detached from the photosphere and that the sizes of the inner radii are correlated with times since outburst. An analysis of the IUE spectra of HM Sge at different epochs suggests that the strength of the 2200 A feature is decreasing with times and the grains responsible for the feature are probably formed in the white dwarf ejecta. A complete accounting of the entire energy budget from radio to X-ray shows that most of the energy is emitted by the cool component in the infrared, and a significant fraction of the flux of the hot component is escaping in the far-ultraviolet. The density-bounded nature of the circumstellar gas nebulae could be the result of a bipolar geometry of the nebulae. Unlike classical novae, the optical outburst of symbiotic novae is due to the ionization of the preexisting envelope of the cool component and is not the result of a sudden ejection by the hot component. 55 refs.

• OSTI ID: 5867968
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 368; ISSN ASJOA; ISSN 0004-637X
• 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
DWARF STARS
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
ENERGY SPECTRA
ERUPTIVE VARIABLE STARS
INFRARED RADIATION
INFRARED SPECTRA
IONIZING RADIATIONS
MASS TRANSFER
MATHEMATICAL MODELS
NOVAE
RADIATION TRANSPORT
RADIATIONS
RADIOWAVE RADIATION
SPECTRA
STAR MODELS
STARS
SYMBIOTIC STARS
VARIABLE STARS
WHITE DWARF STARS
X RADIATION