The dense molecular envelope around the compact H II region G5.89 - 0.39 (W28 A2)

Details The dense molecular envelope around the compact H II region G5.89 - 0.39 (W28 A2) The dense molecular envelope around the compact H II region G5.89 - 0.39 (W28 A2)

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...377..519g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 377, Aug. 20, 1991, p. 519-525. Research supported by Universidad Nacional

Astronomy and Astrophysics

Astronomy

29

Ammonia, H Ii Regions, Interstellar Gas, Molecular Gases, Radio Sources (Astronomy), Star Formation, Astronomical Maps, Gas Flow, Ionized Gases, Radio Astronomy, Very Large Array (Vla)

Scientific paper

VLA observations of ammonia in the (J, K) = (2, 2) and (3, 3) inversion transitions toward the compact H II region G5.89 - 0.39 are presented. These observations reveal the presence of a massive and hot molecular envelope that is clumpy and probably undergoing expansion. Overheated or inverted (3, 3) ammonia emission is detected in front of the H II region. The radio continuum map shows bipolar protuberances, suggesting that the ionized gas is flowing out through openings in the molecular envelope.

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