Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984newsc.101...12l&link_type=abstract
New Scientist (ISSN 0028-6664), vol. 101, March 1, 1984, p. 12-15.
Astronomy and Astrophysics
Astronomy
1
Infrared Stars, Molecular Clouds, Protostars, Radio Sources (Astronomy), Stellar Evolution, Carbon Monoxide, Gravitational Collapse, Interstellar Gas, Orion Nebula
Scientific paper
New techniques in infrared and radio astronomy, and new telescopes such as NASA's 3-meter infrared telescope on Mauna Kea, Hawaii, are discussed in relation to the study of star birth. Analysis of the spectral lines of the radiation-emitting molecules in clouds thought to contain star formation regions shows that many of these clouds are collapsing inwards. It is also demonstrated that high-speed gas flows, close to the stars forming at the center of the molecular clouds, have a bipolar structure. It is proposed that as a molecular cloud collapses, it forms a central disk of dense gas in its core; a star, or stars, condense near the center and then low density gas moves outwards in a bipolar flow out of the two faces of the disk. The center of activity appears to be a region marked IRc2 on infrared maps. In conclusion, the Orion cloud is discussed as an astronomically young system.
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