H/sub 2/ in expanding circumstellar shells

Journal Article · Wed Sep 01 04:00:00 EDT 1976 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/154627· OSTI ID:7350951

Hollenbach, D; Chu, S; McCray, R

Hydrogen molecules are formed in the thin dense shell of interstellar gas swept up by the expanding interstellar bubble around an early-type star with a strong stellar wind. The formation of molecules on grains is not in equilibrium with photodestruction. Theoretical calculations of the column densities of H/sub 2/ in rotational levels J=0--6 agree reasonably well with Copernicus ultraviolet observations of some early-type stars. The model explains why no H/sub 2/ features with column densities in the range 10/sup 15/--10/sup 18/ cm/sup -1/ have been observed. (AIP)

• Research Organization: Department of Physics, University of Colorado at Colorado Springs
• OSTI ID: 7350951
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 208:2; ISSN ASJOA
• 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
COSMIC GASES
COSMIC RADIO SOURCES
CRYOGENIC FLUIDS
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLUID MECHANICS
FLUIDS
GASES
H2 REGIONS
HYDRODYNAMICS
HYDROGEN
INTERSTELLAR GRAINS
INTERSTELLAR MAGNETIC FIELDS
INTERSTELLAR SPACE
IONIZATION
MAGNETIC FIELDS
MECHANICS
MOLECULES
NONMETALS
PARTICLES
ROTATIONAL STATES
SPACE
SPECTRA
STELLAR WINDS
ULTRAVIOLET SPECTRA