A new submillimeter water maser transition at 325 GHz

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

DOI:https://doi.org/10.1086/185857· OSTI ID:6231120

Menten, K M; Melnick, G J; Phillips, T G; Neufeld, D A ^[1]

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

The first astronomical detection of the 325 GHz 5(15) - 4(22) transition of interstellar water vapor is reported. The sources toward which the line was detected, namely the luminous IR and radio continuum sources Orion-KL, W49N, and W51 Main and the low-luminosity cold source IRAS 1629A, are also strongly emitting in the 22 GHz water maser line. Both lines show high-velocity emission toward W49N. It is concluded that 325 GHz masers can arise in the same variety of sources as the 22 GHz masers. Emission at the frequency of the H2()-(18) line was tentatively detected toward Orion-KL. 21 refs.

• OSTI ID: 6231120
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 363; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
COSMIC RADIO SOURCES
DETECTION
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUIDS
GASES
INFRARED RADIATION
INTERSTELLAR SPACE
ISOTOPES
LUMINOSITY
MASERS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
SPACE
SPECTROSCOPY
STAR EVOLUTION
VAPORS
WATER VAPOR