Molecular gas in cometary globules - CG 1

Details Molecular gas in cometary globules - CG 1 Molecular gas in cometary globules - CG 1

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...233..197h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 233, no. 1, July 1990, p. 197-206. Research supported by NWO and Stichting voo

Astronomy and Astrophysics

Astrophysics

19

Comet Tails, Interstellar Gas, Millimeter Waves, Molecular Clouds, Molecular Gases, Carbon Monoxide, Dark Matter, Luminous Intensity

Scientific paper

Detailed molecular line maps of the cometary globule CG 1, which is located toward the Gum nebula, are presented. Spectra of the CO (J = 1-0 and 2-1), (C-13)O (J = 1-0 and 2-1), (C-18)O (1-0), HCN (1-0), HNC (1-0), and CS (2-1) transitions lead to the following main results: (1) the CO emission is seen over the entire optically visible structure; (2) the total molecular mass is 20-45 solar masses; (3) the bulk of the mass is located in the tail; (4) the H2 column densities reach a few 10 to the 21st/sq cm and the H2 densities a few 10,000/cu cm; (5) the gas kinetic temperature from CO is about 15 K in both the central part and the head of the globule; and (6) the star formation efficiency is at least 10 percent.

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