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Centro de Astrofísica da Universidade do Porto

Red bulgeless galaxies in SDSS DR7. Are there any AGN hosts?

B. Coelho, S. Antón, C. Lobo, B. R. L. Ribeiro

Abstract
With the main goal of finding bulgeless galaxies harbouring super massive black holes and showing, at most, just residual star formation activity, we have selected a sample of massive bulgeless red sequence galaxies from the SDSS-DR7, based on the NYU-VAGC catalogue. Multivavelength data were retrieved using EURO-VO tools, and the objects are characterised in terms of degree of star formation and the presence of an AGN. We have found seven objects that are quenched massive galaxies, that have no prominent bulge and that show signs of extra activity in their nuclei, five of them being central in their halo. These objects are rather robust candidates for rare systems that, though devoid of a significant bulge, harbor a supermassive black hole with an activity level likely capable of having halted the star formation through feedback.

Keywords
virtual observatory tools - galaxies: active - galaxies: bulges - galaxies: evolution - galaxies: general - galaxies: stellar content

Monthly Notices of the Royal Astronomical Society
Volume 436, Page 2426
December 2013

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