Ammonia and cyanoacetylene observations of the high density core of L 183 /L 134 n/

Details Ammonia and cyanoacetylene observations of the high density core of L 183 /L 134 n/ Ammonia and cyanoacetylene observations of the high density core of L 183 /L 134 n/

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....88..259u&link_type=abstract

Astronomy and Astrophysics, vol. 88, no. 1-2, Aug. 1980, p. 259-266.

Astronomy and Astrophysics

Astrophysics

103

Acetylene, Ammonia, Cosmic Dust, Cyano Compounds, Interstellar Matter, Stellar Evolution, Astronomical Spectroscopy, Brightness Temperature, Cyanoacetylene, Protostars, Telescopes

Scientific paper

The NH3 (1,1) transition has been mapped in the core of the nearby dark dust cloud L 183 (often called L 134 N) using the Bonn 100 m telescope. Observations at selected positions of the NH3 (2,2) line and of the J equals 1 yields 0, F equals 2 yields 1 transition of HC3N are presented. The ammonia observations are used to derive a rotation temperature of 9 + or - 1 K which appears to be uniform throughout the high density region where NH3 (2,2) was observed. There is no evidence, either from the temperature estimates or from the line widths, for the presence of protostellar objects embedded within the cloud. The NH3 (1,1) results, however, suggest that the core of L 183 consists of two condensations, which are in gravitational equilibrium and are presently quiescent.

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