Detection of molecular hydrogen in the Small Magellanic Cloud H II region N81

Details Detection of molecular hydrogen in the Small Magellanic Cloud H II region N81 Detection of molecular hydrogen in the Small Magellanic Cloud H II region N81

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...291..156k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 291, April 1, 1985, p. 156-159.

Astronomy and Astrophysics

Astronomy

20

H Ii Regions, Infrared Astronomy, Magellanic Clouds, Molecular Clouds, Nebulae, Cosmic Dust, Interstellar Extinction, Spectrophotometry

Scientific paper

Two micron near-infrared spectrophotometry of the compact H II region N81 in the Small Magellanic Cloud is presented. The resulting spectrum is similar to that of the bright galactic H II region G333.6-0.2. The paper reports the detection of molecular hydrogen emission, consistent with the presence of a mild shock moving into a dense ambient medium, which is due to the expansion of the H II region into an associated molecular cloud. Although the nebular core of N81 is virtually dust-free, a 3.76 microns excess suggests the presence of hot dust behind the visible nebula. N81 appears to be excited by a small cluster containing at least one early O star, and several late O and early B stars.

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