Other
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.222..513w&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 222, Oct. 1, 1986, p. 513-523.
Other
68
Astronomical Spectroscopy, Interstellar Masers, Magellanic Clouds, Milky Way Galaxy, Water Masers, H Ii Regions, Hydroxyl Emission, Line Shape, Star Formation
Scientific paper
The authors have searched for 22-GHz H2O maser emission in the Magellanic Clouds and other nearby galaxies. In observations to a limiting luminosity of about 1029.5erg s-1 towards about 80 H II regions of the Large Magellanic Cloud, only four masers were detected. Comparison with H2O observations towards H II regions in our Galaxy suggests that the maser production is considerably lower in the LMC, perhaps indicating a lower rate of star formation. In the search towards the nuclei of nearby southern galaxies only the well-known superluminous masers in NGC 4945 and Circinus galaxy were detected. The mean luminosities were 175 and 29 solar luminosities. Both profiles extend over 150 km s-1 or so and contain narrow components which vary on a time-scale of months. Sometimes several components appear and disappear together, indicating common maser formation in a small-diameter region.
Gardner Frank F.
Whiteoak John B.
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