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Title:
1.0 millimeter maps and radial density distributions of Southern H II/molecular cloud complexes
Authors:
Cheung, L. H.; Frogel, J. A.; Hauser, M. G.; Gezari, D. Y.
Affiliation:
AA(Observatorio Interamericano de Cerro Tololo, La Serena, Chile), AB(Observatorio Interamericano de Cerro Tololo, La Serena, Chile), AC(NASA, Goddard Space Flight Center, Laboratory for Extraterrestrial Physics, Greenbelt, Md.)
Publication:
Astrophysical Journal, Part 1, vol. 240, Aug. 15, 1980, p. 74-83. NASA-supported research (ApJ Homepage)
Publication Date:
08/1980
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Astronomical Maps, Density Distribution, Millimeter Waves, Molecular Clouds, Radial Distribution, Southern Hemisphere, Cosmic Dust, H Ii Regions, Infrared Spectrometers, Interstellar Matter, Luminosity, Milky Way Galaxy, Nebulae, Radio Astronomy, Spectral Resolution, Stellar Evolution
DOI:
10.1086/158208
Bibliographic Code:
1980ApJ...240...74C

Abstract

Measurements of the 1.0-mm continuum emission from seven Southern Hemisphere H II region/molecular cloud complexes located in the inner part of the Galaxy near the galactic plane are presented. The sources were mapped based on observations made by a remote-controlled prime focus infrared photometer on the Cerro Tololo 4-m telescope at a resolution of 65 arcsec. The morphologies and physical characteristics of the sources investigated are found to be similar, with dust column densities of 0.006-0.030 g/sq cm, linear extents of 1.5-3 pc, total masses of 20,000-100,000 solar masses and infrared luminosities between 2 and 4 x 10 to the 6th solar luminosities. In all cases, the dense, extended dust envelopes are observed to be singly peaked and centered about one or more compact near-infrared sources, with a radial density distribution around the central peak proportional to the -1.5 power of the radius as in other extended 1.0-mm continuum sources.

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