Behind the H II region Sharpless 217 - The envelope of the diffuse molecular cloud at G159.1 + 3.3

Details Behind the H II region Sharpless 217 - The envelope of the diffuse molecular cloud at G159.1 + 3.3 Behind the H II region Sharpless 217 - The envelope of the diffuse molecular cloud at G159.1 + 3.3

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....94..679v&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 94, Sept. 1987, p. 679-683.

Astronomy and Astrophysics

Astronomy

3

H Ii Regions, Hydrogen Clouds, Molecular Clouds, Radio Waves, Star Clusters, Stellar Coronas, Supernova 1987A, Data Reduction, Hydrogen Ions, Physical Properties, Wavelengths

Scientific paper

Observations of the methylidyne (CH) molecule were made toward the envelope at G159.1+3.3 of the molecular cloud located behind the H II region Sharpless 217, at (1950) R.A. = 04h55m00s, Dec. = +47°56arcmin. Some of the envelope parameters derived from these CH line observations include a column density of CH of 2×1013cm-2, a line optical depth of -0.001, and a microturbulent velocity of 3.4 km s-1. These observed data are also consistent with a blister-type model for the H II region, roughly facing the earth, coming off the envelope of the molecular cloud.

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