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

Journal Article · Fri Dec 01 04:00:00 EST 1989 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168112· OSTI ID:7058183

Grenier, I A; Lebrun, F; Arnaud, M; Dame, T M; Thaddeus, P ^[1]

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1. CEA, Service d'Astrophysique, Gif-sur-Yvette (France) Centre d'Etude Spatiale des Rayonnements, Toulouse (France) Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (USA)

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. 42 refs.

• OSTI ID: 7058183
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 347; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640102 -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BUBBLES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COSMIC GASES
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
FLUIDS
GAMMA RADIATION
GASES
INTERSTELLAR SPACE
IONIZING RADIATIONS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
RADIOWAVE RADIATION
SPACE
SPECTRA
SUPERNOVA REMNANTS