CO observations of the Cepheus flare. I - Molecular clouds associated with a nearby bubble

Details CO observations of the Cepheus flare. I - Molecular clouds associated with a nearby bubble CO observations of the Cepheus flare. I - Molecular clouds associated with a nearby bubble

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...347..231g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 347, Dec. 1, 1989, p. 231-239.

Astronomy and Astrophysics

Astrophysics

69

Carbon Monoxide, Cepheus Constellation, Molecular Clouds, Supernova Remnants, Cassiopeia Constellation, Emission Spectra, Gamma Rays, Interstellar Gas, Radio Emission

Scientific paper

Extended CO line emission at 2.6 mm has been mapped in the Cepheus region over 490 sq deg at an angular resolution of 0.5 deg with the Columbia 1.2-m telescope. Two molecular clouds, representing a total of 130,000 solar masses have been found above the bulk of the Local arm at a distance of 800-900 pc. The observations also reveal a vast molecular complex at about 300 pc: one cloud in Cassiopeia stretches along a 30-deg arc and contains about 100,000 solar masses, and a second at a similar distance in Cepheus contains 60,000 solar masses. The arrangement of the nearby clouds in a ring 12-deg in diameter, the small amount of atomic and molecular emission inside the ring, the large H I and CO velocity dispersions along its rim, and soft X-ray and radio observations all strongly suggest the presence of a hot bubble between Cepheus and Cassiopeia. As a tentative interpretation, a 40,000-yr old Type I supernova remnant 300 pc away is proposed.

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