Far-infrared observations of the Cepheus OB3 molecular cloud

Journal Article · Sun Feb 15 04:00:00 EST 1981 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/158690· OSTI ID:6337897

Evans, II, N J; Becklin, E E; Beichman, C; Gatley, I; Hilderbrand, R H; Keene, J; Slovak, M H; Werner, M W; Whitcomb, S E

The molecular cloud accompanying the Cepheus OB3 association has been observed in the infrared at wavelengths of 10--400 ..mu..m. Far-infrared emission at 55 ..mu..m and 125 ..mu..m from the two CO hot spots, Cep A and Cep B, was mapped with approx.1' resolution. Cep A was also mapped at 400 ..mu..m with approx.1' resolution. Both hot spots were searched for 20 ..mu..m sources. The Cep A hot spot appears to be heated by energy sources internal to the molecular cloud. The dust temperatures are sufficient to explain the gas temperatures if the dust heats the gas by collisions. In sharp contrast, the Cep B region appears to be heated from outside the cloud, with the strongest far-infrared emission arising near the interface between the molecular cloud and the S155 H II region. The gas heating rate through collisions with dust may be insufficient to achieve the gas temperature observed in Cep B.

• Research Organization: Department of Astronomy, University of Texas at Austin
• OSTI ID: 6337897
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 244:1; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMISTRY
COSMIC DUST
COSMIC GASES
COSMIC RADIO SOURCES
COSMOCHEMISTRY
DUSTS
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
FAR INFRARED RADIATION
FLUIDS
FLUX DENSITY
GASES
H2 REGIONS
INFRARED RADIATION
INFRARED SPECTRA
LUMINOSITY
MOLECULES
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
SPECTRA
STAR CLUSTERS