Molecular clouds in Cygnus. 1: A large-scale (13)CO survey

Details Molecular clouds in Cygnus. 1: A large-scale (13)CO survey Molecular clouds in Cygnus. 1: A large-scale (13)CO survey

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apjs...95..419d&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 95, no. 2, p. 419-456

Astronomy and Astrophysics

Astronomy

72

Astronomical Catalogs, Carbon Monoxide, Cygnus Constellation, Interstellar Gas, Molecular Clouds, Molecular Spectra, Radio Astronomy, Radio Spectra, Sky Surveys (Astronomy), Carbon 13, H Ii Regions, Infrared Astronomy Satellite, Line Spectra, Millimeter Waves, Radio Telescopes, Supernova Remnants, T Tauri Stars

Scientific paper

A large-scale (13)CO (J = 1-0) survey was performed with a 2.7 min angular resolution toward the Cygnus region, using the two 4 m millimeter telescopes at Nagoya University. An area of 432 sq deg was covered with an 8 min grid spacing, and 24,300 positions were observed. Significant (13)CO emission (greater than 1.2 Kkm/s = 3 sigma) is detected at 2191 positions, corresponding to a detection rate of 9%. On the basis of the (13)CO data, 159 distinct clouds are identified. Physical properties of these clouds such as molecular column densities, sizes, and masses are derived for the individual clouds. Astronomical objects associated with the molecular clouds were searched for in the literature. Seven H II regions, three supernova remnants ((SNRs) 45 T Tauri-type stars, 18 molecular outflows, and 215 IRAS point sources selected as candidates for protostars are likely to be associated with the molecular clouds. This paper presents the observational technique used for this survey and a complete list of the detected molecular clouds in Cygnus.

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