Title: The infrared properties of compact galactic radio sources - The young and the restless
Abstract: view Abstract Citations (42) References (14) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Infrared Properties of Compact Galactic Radio Sources: The Young and the Restless White, Richard L. ; Becker, Robert H. ; Helfand, David J. Abstract The 20 cm Galactic plane survey (GPS) of Zoonematkermani et al. (1990) and the IRAS Point Source Catalog are compared using a new technique for distinguishing chance from true coincidences. The comparison shows that the GPS/IRAS sources are Galactic. Several classes of objects are identified. Most are shown to be ultracompact H II regions distributed with amazingly small scale height of 30 pc. It is shown that the IRAS-selected sample of UC H II regions of Wood and Churchwell (1989) is significantly contaminated by objects with a much thicker latitude distribution, which accounts for the larger scale height in that study. It is argued that only the combination of IR and radio observations can distinguish massive embedded O stars from the more numerous, lower mass embedded B stars. Practically all of the radio-selected PNs in the survey area have essentially identical IRAS colors, suggesting that they are in very similar evolutionary states. Publication: The Astrophysical Journal Pub Date: April 1991 DOI: 10.1086/169879 Bibcode: 1991ApJ...371..148W Keywords: Galactic Structure; H Ii Regions; Infrared Spectra; Point Sources; Radio Sources (Astronomy); B Stars; Infrared Astronomy Satellite; O Stars; Planetary Nebulae; Stellar Evolution; Astrophysics; GALAXIES: STRUCTURE; INFRARED: SOURCES; NEBULAE: H II REGIONS; NEBULAE: PLANETARY full text sources ADS |
Publication Year: 1991
Publication Date: 1991-04-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 20
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