Protostellar candidates in a sample of bright far-infrared IRAS sources

CO and radio continuum emission has been observed in the direction of 39 bright 100-micron sources from the IRAS point source catalog in an attempt to better understand the early stages of star formation. All 39 sources are found to be associated with molecular clouds and are generally characterized...

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Bibliographic Details
Published in:The Astronomical journal 1991-04, Vol.101 (4), p.1435-1465
Main Authors: MCCUTCHEON, W. H, DEWDNEY, P. E, PURTON, C. R, SATO, T
Format: Article
Language:English
Subjects:
640102 - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources
Astronomy
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COSMIC GASES
DETECTION
DIAGRAMS
DOCUMENT TYPES
Earth, ocean, space
ELECTROMAGNETIC RADIATION
Exact sciences and technology
FAR INFRARED RADIATION
FLUID FLOW
FLUIDS
GAS FLOW
GASES
HERTZSPRUNG-RUSSELL DIAGRAM
INFRARED RADIATION
Ir sources
MAIN SEQUENCE STARS
OXIDES
OXYGEN COMPOUNDS
POINT SOURCES
PROTOSTARS
RADIATION SOURCES
RADIATIONS
RADIOWAVE RADIATION
STAR EVOLUTION
STARS
Stellar systems. Galactic and extragalactic objects and systems. The universe
Unidentified sources and radiation outside the solar system
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Description
Summary:CO and radio continuum emission has been observed in the direction of 39 bright 100-micron sources from the IRAS point source catalog in an attempt to better understand the early stages of star formation. All 39 sources are found to be associated with molecular clouds and are generally characterized by high temperatures (15-40 K) and wide wings in the profiles (up to 34 km /s). Twenty-six of the 39 sources show wide (C-12)O lines, which are interpreted as a result of gas outflow associated with star formation processes. Of the 24 sources for which distances and 6-cm flux densities can be assigned, 11 are premain sequence objects, and 4 others are possibly in this category. Six of the eleven premain sequence sources have associated continuum emission. (V.L.)
ISSN:0004-6256
1538-3881
DOI:10.1086/115776