Water-vapor maser emission from galactic nuclei

Details Water-vapor maser emission from galactic nuclei Water-vapor maser emission from galactic nuclei

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984natur.310..298c&link_type=abstract

Nature (ISSN 0028-0836), vol. 310, July 26, 1984, p. 298-300.

Physics

118

Galactic Nuclei, Interstellar Masers, Water Masers, Emission Spectra, Starburst Galaxies, Traveling Wave Masers

Scientific paper

The progress of a survey of galactic nuclei for water-vapor maser emission at 22.235 GHz is reported. Twenty-nine late-type galaxies were observed in November 1982, January 1983, and September 1983 using the 40-m radio telescope of the Owens Valley Radio Observatory equipped with a travelling-wave maser receiver. Maser emission has been detected from four nuclei: NGC4258 (M106), NGC1068 (M77), NGC3034 (M82), and NGC6946. The masers in NGC4258 and NGC1068 are extremely luminous; NGC1068 has the most luminous water-vapor maser yet reported - 350 solar luminosities assuming isotropic emission. It is suggested that the extremely bright nuclear masers indicate an ongoing burst of star formation, and therefore provide a useful probe of the physical conditions of the starburst phenomenon.

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