Other
Scientific paper
Apr 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.213..821n&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 213, April 15, 1985, p. 821-831.
Other
58
Active Galactic Nuclei, Hydroxyl Emission, Interstellar Masers, Molecular Clouds, Peculiar Galaxies, Astronomical Maps, Far Infrared Radiation, Galactic Rotation, Radial Velocity, Starburst Galaxies
Scientific paper
IC 4553, a peculiar galaxy at a redshift of 0.02, contains the most luminous and the most distant OH masers yet discovered. Here, 18-cm MERLIN observations of both the OH masers and the nuclear continuum source are presented, and it is found that the masers amplify the image of the nucleus. The nucleus is a core-dominated triple source similar to those seen in other active galactic nuclei, whilst the masers consist of molecular clouds in the plane of the galaxy. The OH populations of these clouds are probably inverted by far-infrared radiation from a recent or current starburst. The masers represent a new tool with which to study active galactic nuclei, and the observations indicate that the triple continuum source represents the interaction of a pair of relativistic jets with a rotating interstellar medium.
Baan Willem A.
Booth Roy S.
Diamond Phil J.
Haschick Aubrey David
Norris Ray P.
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