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Non-Axisymmetrical Components in the Gravitational Potential of Isolated Spiral Galaxies and the Presence of Nuclear Activity1

Published online by Cambridge University Press:  12 April 2016

I. Márquez
I. Márquez*
Affiliation:
Institut d’Astrophysique, 98 bis Bd Arago, 75014 Paris, France

Abstract

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From a detailed photometric analysis together with some kinematical information for a sample of isolated spirals, we conclude that most of them host rings or bars, features generally explained as originating from a non-axisymmetrical component of the gravitational potential. In a previous study, we have determined that all the isolated spirals hosting an active nucleus show these kinds of non-axisymmetrical components, the presence of which could be connected with the nuclear activity in the form that they can be very effective in transporting gas into the central parts. Therefore, as non-active spirals show a similar behavior, a detailed analysis of the possible differences between the central regions of active and non-active isolated spirals is motivated.

Type
Part IV. Observations of Barred Galaxies: Stellar Kinematics, Bulges, AGN
Information
International Astronomical Union Colloquium , Volume 157: Barred Galaxies , 1996 , pp. 212 - 214
Copyright
Copyright © Astronomical Society of the Pacific 1996

Footnotes

2

Visiting Astronomer, German-Spanish Astronomical Center, Calar Alto, operated by the Max-Planck-Institut fur Astronomie jointly with the Spanish National Commission for Astronomy

3

Instituto de Astrofísica de Andalucía (C.S.I.C), Apdo 3004, 18080 Granada (Spain)

1

Based on data obtained at the 1.5m telescope of the Estación de Observación de Calar Alto, Instituto Geográfico Nacional and the Consejo Superior de Investigaciones Científicas through the Instituto de Astrofísica de Andalucía

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