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The Effect of Bars on the Fueling of Star Formation and Nonstellar Activity in Galaxy Nuclei

Published online by Cambridge University Press:  12 April 2016

Luis C. Ho ,
Alexei V. Filippenko  and
Wallace L. W. Sargent
Luis C. Ho
Affiliation:
Center for Astrophysics, 60 Garden St., MS-42, Cambridge, MA 02138
Alexei V. Filippenko
Affiliation:
Department of Astronomy, University of California, Berkeley, CA 94120
Wallace L. W. Sargent
Affiliation:
Palomar Observatory, 105-24 Caltech, Pasadena, CA 91125

Abstract

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Theoretical studies suggest that large-scale stellar bars can be highly effective in delivering gas to the central few hundred parsecs of a spiral galaxy, which may then initiate rapid star formation. Further instabilities may lead to additional inflow to physical scales relevant for active galactic nuclei. We test these predictions in light of recent observations. Compared to unbarred spirals, barred galaxies of type S0-Sbc have a higher probability of exhibiting nuclear star formation, as well as a higher formation rate of massive stars; neither effect is present in spirals of later morphological type. Bars, on the other hand, do not have an obvious influence on active nuclei. We discuss the implications of these findings for the fueling of central star formation and active nuclei.

Type
Part IV. Observations of Barred Galaxies: Stellar Kinematics, Bulges, AGN
Information
International Astronomical Union Colloquium , Volume 157: Barred Galaxies , 1996 , pp. 188 - 196
Copyright
Copyright © Astronomical Society of the Pacific 1996

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