Ionization of the Local Interstellar Medium

We have determined the distribution of the ionization of the interstellar medium within the vicinity of the Sun due to the ultraviolet radiation from nearby white dwarf stars. If one assumes steady state conditions, the ionization is irregular and does not consist of one large continuous cloud, but...

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Bibliographic Details
Published in:Publications of the Astronomical Society of the Pacific 1999-10, Vol.111 (764), p.1258-1268
Main Authors: Tat, Hong H., Terzian, Yervant
Format: Article
Language:English
Subjects:
Effective temperature
Electron density
Interstellar medium
Ionization
Parallax
Radius of a sphere
Stars
Stromgren spheres
Surface temperature
White dwarfs
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Summary:We have determined the distribution of the ionization of the interstellar medium within the vicinity of the Sun due to the ultraviolet radiation from nearby white dwarf stars. If one assumes steady state conditions, the ionization is irregular and does not consist of one large continuous cloud, but instead consists of irregular regions of ionization with occasional mergers of the Strömgren spheres. We also present a compilation of the known white dwarf stars within 20 pc of the Sun.
ISSN:0004-6280
1538-3873
DOI:10.1086/316440