Sharpless 183 - an H II region in the Perseus arm

Details Sharpless 183 - an H II region in the Perseus arm Sharpless 183 - an H II region in the Perseus arm

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...258..495l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 258, no. 2, p. 495-506.

Astronomy and Astrophysics

Astronomy

7

H Ii Regions, Interstellar Matter, Radio Observation, Star Formation, Stellar Winds, Supernova Remnants, Flux Density, Frequency Ranges, Infrared Astronomy Satellite, Radio Sources (Astronomy)

Scientific paper

Results are presented of observations of the emission nebula Sharpless 183 at 408 and 1420 MHz, which yield integrated flux densities of 6.0 +/- 0.6 and 6.2 +/- 0.4 Jy, respectively. The optical object is seen to be a small part of a much larger object; the equivalent diameter of the radio continuum source is 53 arcmin. The spectral index over this frequency range is -0.03 +/- 0.03 after removal of superimposed small-diameter sources. The velocity obtained from the recombination line observation is -63.5 km/s, which places S 183 in the Perseus spiral arm at a distance of 7 +/- 1.5 kpc. H I observations show a circular structure of diameter about 65 arcmin in the velocity range -56.8 to -66.7 km/s; its structure is probably associated with S 183. It is interpreted as a bubble, blown by the stellar winds of the star or stars which excite the H II region.

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