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Active versus non-active galaxies: The seagull wings

Published online by Cambridge University Press:  01 December 2004

A. Mateus ,
R. Cid Fernandes ,
T. Storchi-Bergmann ,
G. Stasińska  and
L. Sodré
A. Mateus
Affiliation:
Dep. de Astronomia, IAG-USP, Rua do Matão 1226, 05508-090, São Paulo, SP, Brazil
R. Cid Fernandes
Affiliation:
Departamento de Física-CFM, UFSC, C.P. 476, 88040-900, Florianópolis, SC, Brazil
T. Storchi-Bergmann
Affiliation:
Instituto de Física, UFRGS, C.P. 15001, 91501-970, Porto Alegre, RS, Brazil
G. Stasińska
Affiliation:
LUTH, Observatoire de Meudon, 5 Place Jules Janssen, F-92195 Meudon Cedex, France
L. Sodré
Affiliation:
Dep. de Astronomia, IAG-USP, Rua do Matão 1226, 05508-090, São Paulo, SP, Brazil
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Abstract

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We have compared galaxies hosting an active nucleus with non-active galaxies in the SDSS by analyzing their stellar populations. We conclude that the Seyfert 2 phenomenon appears in galaxies of intermediate masses (∼2 × 1010 M$_\odot$), while low mass galaxies do not produce active nuclei, and high mass galaxies tend to produce a low level of non-stellar activity. We also compared the environment of active and non-active galaxies of similar masses and concluded that there is no excess of close neighbors among the Seyferts when compared with non-active galaxies.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
POSTERS
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS222 , March 2004 , pp. 457 - 458
Copyright
© 2004 International Astronomical Union