The development of compact dust-bounded H II regions. I. Their relation to infrared objects and maser sources

Journal Article · Sat Jan 15 04:00:00 EST 1977 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/154944· OSTI ID:7304827

Cochran, W D; Ostriker, J P

The consequences of the birth of a massive star within a dense dusty cloud are investigated. Radiation pressure from the star sweeps up the grains from the infalling gas to form a dust shell which bounds the H II region of the star. This cocoon is opaque to the stellar photons and will reradiate the stellar luminosity in the infrared, providing a plausibe explanation of the infrared ''point'' sources associated with dense interstellar cloud complexes. A radiation pressure drives the shell outward, a dense region of cold neutral gas develops between the dust shell and the shock front preceding it which is bathed with the intense infrared radiation from the dust shell. It is suggested that such regions may provide suitable conditions for OH and H/sub 2/O maser emission. The models are compared with observations of Sharpless 2-106, W3(A) IRS-1 and IRS-8, and the OH sources ON-1 and ON-2.

• Research Organization: Princeton University Observatory
• OSTI ID: 7304827
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 211:2; 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
AMPLIFIERS
COSMIC DUST
COSMIC GASES
COSMIC RADIO SOURCES
DUSTS
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
FLUID MECHANICS
FLUIDS
GASES
H2 REGIONS
HYDRODYNAMICS
INFRARED RADIATION
INTERSTELLAR GRAINS
IONIZATION
MASERS
MECHANICS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
NEBULAE
PARTICLES
RADIATIONS
SHOCK WAVES
STAR ACCRETION
STAR EVOLUTION