NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-20 T10:00:46 PDT
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For refcode 1990ApJ...358..132T:
Retrieve 12 NED objects in this reference.
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Copyright by American Astronomical Society. Reproduced by permission
1990ApJ...358..132T CIRCUMNUCLEAR MOLECULAR GAS IN SEYFERT GALAXIES YOSHIAKI TANIGUCHI Kiso Observatory, Institute of Astronomy, The University of Tokyo OSAMU KAMEYA AND NAOMASA NAKAI Nobeyama Radio Observatory, National Astronomica Observatory of Japan AND KIMIAKI KAWARA National Astronomical Observatory of Japan Received 1989 October 31; accepted 1990 January 23 ABSTRACT We have made a search for circumnuclear ^12^CO (J = 1-0) emission from 12 Seyfert galaxies with recession velocities less than 5000 km s^-1^, using the Nobeyama Radio Observatory 45 m telescope. The full half-power beamwidth of 17" covers less than about 5 kpc in diameter for the sample galaxies. Circumnuclear CO emission has been detected from four Seyfert galaxies. Among them, NGC 591 (=Mrk 1157) is a new detection. Comparing our results with those of published larger beam CO observations, we find that molecular gas clouds are not highly concentrated in the circumnuclear zones in the Seyfert galaxies. This property is different from that of starburst nuclei, in which the inner surface density of molecular gas is significantly higher than that of the outer one. However, there is no significant difference in the circumnuclear molecular gas densities between the Seyferts and the starburst nuclei. This implies that the circumnuclear molecular gas density within a diameter of less than 5 kpc is not a key parameter determining which activity occurs in galactic nuclei. Subject headings: galaxies: interstellar matter - galaxies: nuclei - galaxies: Seyfert - radio sources: galaxies
Retrieve 12 NED objects in this reference.
Please click here for ADS abstract

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