Ammonia in B 335

Details Ammonia in B 335 Ammonia in B 335

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...137..108m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 137, no. 1, Aug. 1984, p. 108-112.

Astronomy and Astrophysics

Astrophysics

53

Ammonia, Astronomical Spectroscopy, Molecular Clouds, Stellar Evolution, Rotation, Temperature Distribution, Water Masers

Scientific paper

A map of the NH3 (1,1) line towards the nearby isolated dark globule B335 is presented. The core of the globule with H2 density of order 104 cm-3 is extended over a region 0.04×0.09 pc. The authors put an upper limit of 2×10-14s-1 upon the angular velocity of rotation of this gas. From measurements at 5 positions of the NH3 (2,2) line, they find that the temperature of the gas is 10 - 12K and is uniform over the core region. They interpret the data in the light of the discovery by Keene et al. (1983) of a compact far infrared object close to the peak of the ammonia emission. Model fits which have been made to the spectrum of this object are consistent with the presence of a low mass star surrounded by a circumstellar shell with density of order 106 cm-3 and diameter roughly 0.03 pc. However, it is suggested that ammonia is underabundant in the high density region. A search for H2O masers towards the core of the globule proved negative.

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