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

Abstract

view Abstract Citations (91) References (38) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS CO Observations of the Cepheus Flare. I. Molecular Clouds Associated with a Nearby Bubble Grenier, I. A. ; Lebrun, F. ; Arnaud, M. ; Dame, T. M. ; Thaddeus, P. Abstract 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. Publication: The Astrophysical Journal Pub Date: December 1989 DOI: 10.1086/168112 Bibcode: 1989ApJ...347..231G Keywords: Carbon Monoxide; Cepheus Constellation; Molecular Clouds; Supernova Remnants; Cassiopeia Constellation; Emission Spectra; Gamma Rays; Interstellar Gas; Radio Emission; Astrophysics; GALAXIES: THE GALAXY; GALAXIES: STRUCTURE; INTERSTELLAR: MOLECULES; NEBULAE: SUPERNOVA REMNANTS full text sources ADS | data products SIMBAD (15) Related Materials (1) Part 2: 1990ApJ...360..129G