Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...282..675j&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 282, July 15, 1984, p. 675-682. Research supported by the University of Min
Astronomy and Astrophysics
Astronomy
52
Globules, Infrared Astronomy, Interstellar Matter, Near Infrared Radiation, Nebulae, Stellar Spectrophotometry, Gas Temperature, Magnetic Fields, Molecular Spectra, Spatial Distribution
Scientific paper
Bok globule 2 in the Southern Coalsack dark cloud is characterized on the basis of JHK photometry and spectroscopy and H-band polarimetry obtained with the Anglo-Australian Telescope and 65-micron and 135-micron observations obtained with the Kuiper Airborne Observatory. The data are presented in tables and graphs and discussed in detail. A 3-sigma upper limit of 3 Jy is found for the 135-micron emission, no central density enhancement is detected down to 15 arcsec, and the temperatures of the dust and gas are estimated as 10 K or less. The polarization map shows some evidence for a magnetic-field-induced structure, but not at the very high (mG) level required for magnetic support of a cold quiescent stable gas sphere in a conventional paramagnetic-relaxation model. Alternative explanations based on weaker magnetic-field effects (as suggested by Mouschovias, 1978), superparamagnetism, or such nonthermal spinup mechanisms as H2 formation at active sites are examined briefly.
Bailey Jeremy
Hyland A. R.
Jones Terry J.
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