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For refcode 1992MNRAS.258..725S:
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Copyright by Royal Astronomical Society. 1992MNRAS.258..725S Southern OH megamaser survey L. Staveley-Smith, R. P. Norris, J. M. Chapman, D. A. Allen, J. B. Whiteoak and A. L. Roy Australia Telescope National Facility, CSIRO, PO Box 76, Epping, NSW 2121, Australia Anglo-Australian Observatory PO Box 296, Epping, NSW2l2l, Australia School of Physics, University of Sydney, NSW2000, Australia Accepted 1992 April 10. Received 1992 February 21 SUMMARY A search for OH emission from luminous IRAS galaxies with the Parkes telescope has been completed. Two new megamasers were found out of 122 galaxies searched. The low success rate results from the relatively wide range in far-infrared colour temperatures and the corresponding low far-infrared luminosity of many of the selected candidates. Based on these and previous searches we discuss the required conditions for OH megamaser emission, and derive the set of variables necessary to explain the observed correlations for megamasers. New redshifts for 47 of the candidates were obtained with the 1 .9-m Mt Stromlo telescope and the Anglo-Australian Telescope. Detailed spectroscopy of two of the megamaser galaxies shows them to have low-ionization emission-line nuclei, suggesting the presence of highly obscured active nuclei. Radio continuum measurements have also been made of known megamaser galaxies with the Compact Array of the Australia Telescope. The radio-infrared relation is tightly defined for megamaser galaxies. As a class they have somewhat lower 5-GHz to 60-micron flux density ratios than spiral galaxies, consistent with megamasers being found in young starburst galaxies. Key words: masers - galaxies: active - galaxies: nuclei - galaxies: starburst - radio continuum: galaxies - radio lines: molecular: interstellar.
Retrieve 147 NED objects in this reference.
Please click here for ADS abstract

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