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Late-type components of slow novae and symbiotic stars

Journal Article:

Abstract

It is argued that the various types of symbiotic stars and the slow novae are the same phenomena exhibiting a range of associated time-scales, the slow novae being of intermediate speed. Evidence is summarized showing that both types of object contain normal M giants or mira variables. This fact is at odds with currently fashionable single-star models for slow novae, according to which the M star is totally disrupted before the outburst. Spectral types of the late-type components are presented for nearly 80 symbiotic stars and slow novae, derived from 2 ..mu..m spectroscopy. It is found that both the intensity of the emission spectrum and the electron density of the gas are functions of the spectral type of the late-type star. Explanations for these correlations are given. On the assumption that the late-type components are normal giants, spectroscopic parallaxes are determined; credible distances are derived which indicate that the known symbiotic stars have been sampled as far afield as the Galactic Centre. Hydrogen shell flashes on a white dwarf accreting gas from the late-type components offer an attractive explanation of the phenomena of slow novae and symbiotic stars, and such models are discussed in the concluding section.
Authors:
Allen, D A; [1]  Royal Observatory, Edinburgh (UK))
  1. Anglo-Australian Observatory, Epping (Australia)
Publication Date:
Aug 01, 1980
Product Type:
Journal Article
Reference Number:
AIX-11-567559; EDB-81-101138
Resource Relation:
Journal Name: Mon. Not. R. Astron. Soc.; (United Kingdom); Journal Volume: 192:2
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; NOVAE; STAR MODELS; ELECTRON DENSITY; EMISSION SPECTRA; GIANT STARS; INFRARED RADIATION; ELECTROMAGNETIC RADIATION; ERUPTIVE VARIABLE STARS; MATHEMATICAL MODELS; RADIATIONS; SPECTRA; STARS; VARIABLE STARS; 640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources
OSTI ID:
6278124
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: MNRAA
Submitting Site:
INIS
Size:
Pages: 521-530
Announcement Date:

Journal Article:

Citation Formats

Allen, D A, and Royal Observatory, Edinburgh (UK)). Late-type components of slow novae and symbiotic stars. United Kingdom: N. p., 1980. Web.
Allen, D A, & Royal Observatory, Edinburgh (UK)). Late-type components of slow novae and symbiotic stars. United Kingdom.
Allen, D A, and Royal Observatory, Edinburgh (UK)). 1980. "Late-type components of slow novae and symbiotic stars." United Kingdom.
@misc{etde_6278124,
title = {Late-type components of slow novae and symbiotic stars}
author = {Allen, D A, and Royal Observatory, Edinburgh (UK))}
abstractNote = {It is argued that the various types of symbiotic stars and the slow novae are the same phenomena exhibiting a range of associated time-scales, the slow novae being of intermediate speed. Evidence is summarized showing that both types of object contain normal M giants or mira variables. This fact is at odds with currently fashionable single-star models for slow novae, according to which the M star is totally disrupted before the outburst. Spectral types of the late-type components are presented for nearly 80 symbiotic stars and slow novae, derived from 2 ..mu..m spectroscopy. It is found that both the intensity of the emission spectrum and the electron density of the gas are functions of the spectral type of the late-type star. Explanations for these correlations are given. On the assumption that the late-type components are normal giants, spectroscopic parallaxes are determined; credible distances are derived which indicate that the known symbiotic stars have been sampled as far afield as the Galactic Centre. Hydrogen shell flashes on a white dwarf accreting gas from the late-type components offer an attractive explanation of the phenomena of slow novae and symbiotic stars, and such models are discussed in the concluding section.}
journal = {Mon. Not. R. Astron. Soc.; (United Kingdom)}
volume = {192:2}
journal type = {AC}
place = {United Kingdom}
year = {1980}
month = {Aug}
}