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AGN Absorption Linked to Host Galaxies

Published online by Cambridge University Press:  25 July 2014

Stéphanie Juneau
Stéphanie Juneau*
Affiliation:
CEA-Saclay DSM/IRFU/SAp 91191 Gif-sur-Yvette, France email: [email protected]
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Abstract

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Multiwavelength identification of AGN is crucial not only to obtain a more complete census, but also to learn about the physical state of the nuclear activity (obscuration, efficiency, etc.). A panchromatic strategy plays an especially important role when the host galaxies are star-forming. Selecting far-Infrared galaxies at 0.3<z<1, and using AGN tracers in the X-ray, optical spectra, mid-infrared, and radio regimes, we found a twice higher AGN fraction than previous studies, thanks to the combined AGN identification methods and in particular the recent Mass-Excitation (MEx) diagnostic diagram. We furthermore find an intriguing relation between AGN X-ray absorption and the specific star formation rate (sSFR) of the host galaxies, indicating a physical link between X-ray absorption and either the gas fraction or the gas geometry in the hosts. These findings have implications for our current understanding of both the AGN unification model and the nature of the black hole-galaxy connection.

Keywords

galaxies: activegalaxies: evolutiongalaxies: Seyfertquasars: emission lines
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S304: Multiwavelength AGN Surveys and Studies , October 2013 , pp. 319 - 322
Copyright
Copyright © International Astronomical Union 2014 

References

Alexander, D. M. & Hickox, R. C. 2012, NewAR 56, 93Google Scholar
Bournaud, F., Dekel, A., Teyssier, R., et al. 2011, ApJ (Letters) 741, 33CrossRefGoogle Scholar
Bournaud, F., Juneau, S., Le Floch, E., et al. 2012, ApJ 757, 81Google Scholar
Croton, D. J., Springel, V., White, S. D. M., et al. 2006, MNRAS, 365, 11Google Scholar
Del Moro, A., Alexander, D. M., Mullaney, J. R., et al. 2013, A&A 549, 59Google Scholar
Hopkins, P. F. & Quataert, E. 2010, MNRAS, 407, 1529Google Scholar
Juneau, S., Dickinson, M., Bournaud, F., et al. 2013, ApJ, 764, 176Google Scholar
Juneau, S., Dickinson, M., Alexander, D. M., & Salim, S. 2011, ApJ, 736, 104Google Scholar
Kartaltepe, J. S., Dickinson, M., Alexander, D. M., et al. 2012, ApJ, 757, 23CrossRefGoogle Scholar
Kauffmann, G., Heckman, T. M., Tremonti, C., et al. 2003, MNRAS, 346, 1055CrossRefGoogle Scholar
Kewley, L. J., Heisler, C. A., Dopita, M. A., & Lumsden, S. 2001, ApJ (Supplement), 132, 37Google Scholar
Rosario, D. J., Santini, P., Lutz, D., et al. 2013 ApJ, 771, 63Google Scholar
Sargent, M. T., Daddi, E., Béthermin, M., et al. 2013 ApJ in press, arXiv:1303.4392Google Scholar
Stern, D., Eisenhardt, P., Gorjian, V., et al. 2005 ApJ, 631, 163Google Scholar