VLA maps of ammonia in Orion-KL - Fine-scale structure and geometry

Details VLA maps of ammonia in Orion-KL - Fine-scale structure and geometry VLA maps of ammonia in Orion-KL - Fine-scale structure and geometry

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...201..276h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 201, no. 2, Aug. 1988, p. 276-284.

Astronomy and Astrophysics

Astrophysics

22

Ammonia, Astronomical Maps, Line Spectra, Orion Nebula, Very Large Array (Vla), Fine Structure, Infrared Stars, Molecular Clouds, Star Formation

Scientific paper

Maps of the Kleinmann-Low nebula have been obtained with 2-arcsec resolution in the (J,K) + (4,3) inversion line of ammonia, covering a V(LSR) velocity range of -15 to +25 km/s. The results indicate that the (4,3) and (3,3) lines arise from locations which have different kinetic temperatures. Close to IRc4, the (3,3)-line intensity is larger than that of the (4,3) line, and it is suggested that IRc4 is a temperature, but not a density or column density, maximum. It is found that the hot core is 3-5 x 10 to the 16th cm from the heat source, and that the mass loss rate of IRc2 is about 6 x 10 to the -5th solar masses per year.

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