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Spectral energy distributions of type 1 AGN in XMM-COSMOS – II. Shape evolution

Hao, Heng and Elvis, Martin and Civano, Francesca and Zamorani, Gianni and Ho, Luis C. and Comastri, Andrea and Brusa, Marcella and Bongiorno, Angela and Merloni, Anton M. and Trump, Jonathan R. and Salvato, Mara and Impey, Chris D. and Koekemoer, Anton M. and Lanzuisi, Giorgio and Celotti, Annalisa and Jahnke, Knud and Vignali, Cristian and Silverman, John D. and Urry, C. Megan and Schawinski, Kevin and Capak, Peter (2014) Spectral energy distributions of type 1 AGN in XMM-COSMOS – II. Shape evolution. Monthly Notices of the Royal Astronomical Society, 438 (2). pp. 1288-1304. ISSN 0035-8711. doi:10.1093/mnras/stt2274.

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The mid-infrared-to-ultraviolet (0.1–10 μm) spectral energy distribution (SED) shapes of 407 X-ray-selected radio-quiet type 1 active galactic nuclei (AGN) in the wide-field ‘Cosmic Evolution Survey’ (COSMOS) have been studied for signs of evolution. For a sub-sample of 200 radio-quiet quasars with black hole mass estimates and host galaxy corrections, we studied their mean SEDs as a function of a broad range of redshift, bolometric luminosity, black hole mass and Eddington ratio, and compared them with the Elvis et al. (E94) type 1 AGN mean SED. We found that the mean SEDs in each bin are closely similar to each other, showing no statistical significant evidence of dependence on any of the analysed parameters. We also measured the SED dispersion as a function of these four parameters, and found no significant dependences. The dispersion of the XMM-COSMOS SEDs is generally larger than E94 SED dispersion in the ultraviolet, which might be due to the broader ‘window function’ for COSMOS quasars, and their X-ray-based selection.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Civano, Francesca0000-0002-2115-1137
Ho, Luis C.0000-0001-6947-5846
Comastri, Andrea0000-0003-3451-9970
Brusa, Marcella0000-0002-5059-6848
Salvato, Mara0000-0001-7116-9303
Koekemoer, Anton M.0000-0002-6610-2048
Lanzuisi, Giorgio0000-0001-9094-0984
Jahnke, Knud0000-0003-3804-2137
Vignali, Cristian0000-0002-8853-9611
Silverman, John D.0000-0002-0000-6977
Urry, C. Megan0000-0002-0745-9792
Schawinski, Kevin0000-0001-5464-0888
Capak, Peter0000-0003-3578-6843
Additional Information:© 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2013 November 21; received 2013 November 21; in original form 2012 October 10. HH thanks Belinda Wilkes and Martin J. Ward for discussion. This work was supported in part by NASA Chandra grant number G07-8136A (HH, ME, FC) and the Smithsonian Scholarly Studies (FC). Support from the Italian Space Agency (ASI) under the contracts ASI-INAF I/088/06/0 and I/009/10/0 is acknowledged (AC and CV). MS acknowledges support by the German Deutsche Forschungsgemeinschaft,DFG Leibniz Prize (FKZHA1850/28-1). KS gratefully acknowledges support from Swiss National Science Foundation Grant PP00P2_138979/1.
Group:COSMOS, Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Smithsonian InstitutionUNSPECIFIED
Agenzia Spaziale Italiana (ASI)ASI-INAF I/088/06/0
Agenzia Spaziale Italiana (ASI)I/009/10/0
Deutsche Forschungsgemeinschaft (DFG)HA 1850/28-1
Swiss National Science Foundation (SNSF)PP00P2_138979/1
Istituto Nazionale di Astrofisica (INAF)UNSPECIFIED
Subject Keywords:surveys; galaxies: evolution; quasars: general
Issue or Number:2
Record Number:CaltechAUTHORS:20140310-095412032
Persistent URL:
Official Citation:Hao, H., Elvis, M., Civano, F., Zamorani, G., Ho, L. C., Comastri, A., . . . Capak, P. (2014). Spectral energy distributions of type 1 AGN in XMM-COSMOS – II. Shape evolution. Monthly Notices of the Royal Astronomical Society, 438(2), 1288-1304. doi: 10.1093/mnras/stt2274
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:44213
Deposited On:11 Mar 2014 03:57
Last Modified:10 Nov 2021 16:49

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