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5.10. Peculiar CO distribution in active spiral galaxies: NCG4258 and Circinus

Published online by Cambridge University Press:  25 May 2016

M. Krause ,
N. Neininger ,
M. Elmouttie ,
K.L. Jones  and
R.F. Haynes
M. Krause
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
N. Neininger
Affiliation:
Radioastronomisches Institut der Universität Bonn, Auf dem Hügel 71, D-53121 Bonn, Germany
M. Elmouttie
Affiliation:
The Physics Department of the University of Queensland, QLD4072, Australia
K.L. Jones
Affiliation:
The Physics Department of the University of Queensland, QLD4072, Australia
R.F. Haynes
Affiliation:
The Australia Telescope National Facility, CSIRO, P.O. Box 76, NSW 2121, Australia

Extract

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NGC4258 and Circinus are both nearby spiral galaxies with active galactic nuclei which show high velocity water maser emission and Seyfert 2 characteristics. Both show radio emission perpendicular to the normal spiral arms which seem to be related to the nuclear activity (van der Kruit et al., 1972; Harnett et al., 1990). In NGC 4258 they coincide with the inner part of the rapidly rotating nuclear disk as expected for nuclear jets. Due to the strong misalignment of the nuclear disk plane with the galaxy's disk plane the jets pass the galactic disk. Molecular gas in NGC 4258 has only been detected in the nucleus and along the Hα jets up to a distance of 2 kpc from the nucleus (Krause et al., 1990).

Type
Part II. Nuclear Interstellar Medium
Information
Symposium - International Astronomical Union , Volume 184: The Central Regions of the Galaxy and Galaxies , 1998 , pp. 229 - 230
Copyright
Copyright © Kluwer 1998 

References

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