Interpretation of the newly discovered submillimeter water maser

Journal Article · Thu Mar 01 04:00:00 EST 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/185681· OSTI ID:6769957

Neufeld, D A; Melnick, G J ^[1]

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1. California Univ., Berkeley (USA) Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (USA)

The 10(29)-9(36)321 GHz water maser discovered recently by Menten et al. (1990) may be pumped collisionally under a wide range of physical conditions. This range of conditions is similar but not identical to that required to excite the well-studied 22 GHz water maser. The ratio of the observed 22 GHz and 321 GHz intersteller maser luminosities can be explained by collisional excitation within the same warm, dense gas. Collisional pumping in a circumstellar envelope can account for the observed 321 GHz maser emission in the supergiant star VY CMa. 11 refs.

• OSTI ID: 6769957
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 352; 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
AMPLIFIERS
ELECTRONIC EQUIPMENT
EMISSION SPECTRA
EQUIPMENT
GIANT STARS
HYDROGEN COMPOUNDS
INTERSTELLAR SPACE
LUMINOSITY
MASERS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
OPTICAL PROPERTIES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SPACE
SPECTRA
STAR EVOLUTION
STARS
SUPERGIANT STARS
WATER