Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977sci...197..723w&link_type=abstract
Science, vol. 197, Aug. 19, 1977, p. 723-732.
Astronomy and Astrophysics
Astronomy
31
Cosmic Dust, Infrared Astronomy, Interstellar Gas, Star Formation, Astronomical Maps, Energy Distribution, Gas Density, Gravitational Collapse, Infrared Spectra, Luminous Intensity, Molecular Spectra, Stellar Luminosity
Scientific paper
Infrared observations at wavelengths of a few microns to 1 mm are reviewed which pertain to the problem of star formation. The data considered include observations of large gas and dust clouds within which stars may be forming and detailed studies of individual objects within these clouds. Stages of star formation are outlined, the IR luminosity of forming stars is examined, and criteria for selecting interstellar regions for IR studies are discussed along with the importance of dust in the IR energy distributions of star-formation regions. Detailed results, including IR maps, are evaluated for the Orion Molecular Cloud 1 (OMC-1), W3, OMC-2, Mon R2, RCW 57, M17, CRL 2591, and NGC 7538. Some general properties of star-formation regions are summarized, and observational techniques for IR astronomy are described. It is noted that the discovery of possible pre-main-sequence (PMS) objects in the densest central portions of larger clouds supports the generally accepted premise of gravitational collapse as the driving mechanism for the star-formation process and that the observed properties of possible PMS objects agree qualitatively with the predictions of detailed models based on gravitational collapse.
Becklin Eric E.
Neugebauer Gernot
Werner Michael W.
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