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Spitzer IRS Observations of Low-Mass Seyfert Galaxies

Published online by Cambridge University Press:  03 June 2010

Carol E. Thornton ,
Aaron J. Barth ,
Luis C. Ho  and
Jenny E. Greene
Carol E. Thornton
Affiliation:
Department of Physics & Astronomy, 4129 Frederick Reines Hall, University of California, Irvine, Irvine, CA 92679, USA Email: thorntoc@uci.edu, barth@uci.edu
Aaron J. Barth
Affiliation:
Department of Physics & Astronomy, 4129 Frederick Reines Hall, University of California, Irvine, Irvine, CA 92679, USA Email: thorntoc@uci.edu, barth@uci.edu
Luis C. Ho
Affiliation:
The Observatories of the Carnegie Institution for Science813 Santa Barbara Street, Pasadena, CA 91101, USA Email: lho@obs.carnegiescience.edu
Jenny E. Greene
Affiliation:
Department of Astrophysical Sciences, Princeton University Princeton, NJ 08544, USA Email: jgreene@astro.princeton.edu
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The Sloan Digital Sky Survey has made it possible to identify the first samples of active galaxies with estimated black hole masses below ~ 106M⊙. We have obtained Spitzer IRS low-resolution spectra, covering 5–38 μm, of a sample of 41 Seyfert galaxies with low-mass black holes. Our sample includes SDSS-selected objects from the low-mass Seyfert 1 sample of Greene & Ho (2004) and the low-mass Seyfert 2 sample of Barth et al. (2008), as well as NGC 4395 and POX 52. The goals of this work are to examine the dust emission properties of these objects and investigate the relationship between type 1 and type 2 AGNs at low luminosities and low masses, to search for evidence of star formation, and to use emission-line diagnostics to constrain physical conditions within the narrow-line regions. Here we present preliminary results from this project.

Keywords

galaxies: activegalaxies: dwarfgalaxies: nucleigalaxies: Seyfertinfrared: galaxies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S267: Co-Evolution of Central Black Holes and Galaxies , August 2009 , pp. 268
Copyright
Copyright © International Astronomical Union 2010

References

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