Anatomy of a dark cloud - A multimolecular study of Barnard 1

Details Anatomy of a dark cloud - A multimolecular study of Barnard 1 Anatomy of a dark cloud - A multimolecular study of Barnard 1

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...236..461b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 236, no. 2, Sept. 1990, p. 461-471. Research supported by CICYT.

Astronomy and Astrophysics

Astrophysics

68

Dark Matter, Molecular Clouds, Abundance, Emission Spectra, Interstellar Magnetic Fields, Molecular Spectra, Star Formation

Scientific paper

New radio observations of molecular lines are presented for Barnard 1, a dark cloud in the local Perseus molecular complex. A large-scale map of the emission in the CS J = 1-0 line reveals a dense region of about 2 x 5 pc, with a mass of about 1200 solar masses (for an assumed distance of 350 pc). The similarity between CS and (C-13)O J = 1-0 emission suggests that a fraction of the mass of the cloud external envelope is in the form of clumps with density of the order of 10,000/cu cm. Maps in the NH3 lines of the main core of B1 with 40-arcsec resolution show evidence for two clumps of 0.07 and 0.21 pc in size and masses in excess of 0.4 and 13 solar masses, respectively. An examination of the dynamical state of B1 suggests that the cloud is near magnetic and virial equilibrium.

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