Physical conditions in the IRAS 16293-2422 parent cloud

Details Physical conditions in the IRAS 16293-2422 parent cloud Physical conditions in the IRAS 16293-2422 parent cloud

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...177l..57m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 177, no. 1-2, May 1987, p. L57-L60.

Astronomy and Astrophysics

Astronomy

60

Molecular Clouds, Star Formation, Carbon Monoxide, Infrared Astronomy Satellite, Molecular Gases, Protostars, Stellar Mass Accretion

Scientific paper

An analysis of fully sampled maps in the CS J = 2-1 and 3-2 lines over a 90 x 90 deg region indicates that the molecular gas surrounding IRAS 1629A is in a modified Keplerian motion around this object. Data are consistent with the excitation of the CS self-absorption, and the NH3 rotation temperature of the IRAS 1629A molecular envelope is close to the dust temperature. A CS/H2 abundance ratio of 4 x 10 to the -9th is implied. The present data for the parent cloud are consistent with the picture of a thick rotating disk in approximate hydrostatic equilibrium with the turbulent pressure of the gas, and with a steep density gradient with radius inferred. An upper kinematic mass limit for the embedded object of about 2.3 solar masses inside R of about 8 x 10 to the 15th cm is found which is consistent with a total luminosity of about 27 solar luminosities.

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