The ionization of cloud and intercloud hydrogen by O and B stars
Journal Article
·
· Astrophys. J.; (United States)
A model for the interstellar medium is investigated in which all of the O-star Lyman continuum radiation is converted into Balmer radiation in unit-density Stromgren spheres, and the radiation from B stars and the nuclei of planetary nebulae ionizes a low-density medium which contains standard clouds. Values are derived for the density of this model ICM which simultaneously accounts for the observed background of H..cap alpha.. emission and the pulsar dispersion measures. (AIP)
- Research Organization:
- Princeton University Observatory
- OSTI ID:
- 7184414
- Journal Information:
- Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 205:2; ISSN ASJOA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640102 -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
640103 -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC RADIO SOURCES
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
H2 REGIONS
HYDROGEN
INTERSTELLAR SPACE
IONIZATION
NEBULAE
NONMETALS
PLANETARY NEBULAE
PULSARS
SPACE
STARS
SUPERNOVAE
Radio & X-Ray Sources
640103 -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC RADIO SOURCES
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
H2 REGIONS
HYDROGEN
INTERSTELLAR SPACE
IONIZATION
NEBULAE
NONMETALS
PLANETARY NEBULAE
PULSARS
SPACE
STARS
SUPERNOVAE