G34.3 + 0.2 - A 'cometary' H II region

Details G34.3 + 0.2 - A 'cometary' H II region G34.3 + 0.2 - A 'cometary' H II region

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...288l..17r&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 288, Jan. 1, 1985, p. L17-L19.

Astronomy and Astrophysics

Astrophysics

72

H Ii Regions, Nebulae, Stellar Winds, Astronomical Maps, Interferometry, Supernova Remnants

Scientific paper

Radio-frequency observations of the H II complex G34.3 + 0.2 made at 1 arcsec resolution with the VLA indicate a component whose appearance resembles that of a comet, containing an ultracompact H II 'head' and a diffuse 'tail'. This 'cometary' H II region points (from tail through head) in the direction of the supernova remnant W44 which lies at a projected separation of 40 pc. The morphology of the cometary source might be explained as owing to the interaction of a newly formed O type star with a large (40 pc radius) shell. This shell is seen in both CO and H I and may have been driven outward from the center of W44 by a wind from the stellar precursor to the supernova.

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