Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.237..673n&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 237, April 1, 1989, p. 673-681.
Astronomy and Astrophysics
Astronomy
18
Galaxies, Hydroxyl Emission, Interstellar Masers, H I Regions, Infrared Astronomy, Red Shift, Southern Hemisphere
Scientific paper
The results of a search for OH megamaser emission from a sample of 32 galaxies selected from the IRAS Point Source Catalog on the basis of their IR properties are presented. For each galaxy (other than those few already observed elsewhere), an optical redshift is obtained and both OH and H I emission are sought. The search yielded one new OH megamaser galaxy, and H I was detected toward nine objects. There are unlikely to be any OH megamasers in the Southern Hemisphere with flux densities comparable to that of Arp 220 (280 mJy), although there may be a population of weaker megamasers. No special conditions are required to explain the known OH megamasers other than those expected in a cool, dusty, active galaxy.
Allen David A.
Gardner Frank F.
Norris Ray P.
Roche Patrick F.
Whiteoak John B.
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