Skip to main content

Research Repository

Advanced Search

Reaching the peak of the quasar spectral energy distribution - I. Observations and models

Collinson, J.S.; Ward, M.J.; Done, C.; Landt, H.; Elvis, M.; McDowell, J.C.

Reaching the peak of the quasar spectral energy distribution - I. Observations and models Thumbnail


Authors

J.S. Collinson

M.J. Ward

H. Landt

M. Elvis

J.C. McDowell



Abstract

We perform a spectral analysis of a sample of 11 medium redshift (1.5 ≲ z ≲ 2.2) quasars. Our sample all have optical spectra from the SDSS, infrared spectra from GNIRS and TripleSpec, and X-ray spectra from XMM–Newton. We first analyse the Balmer broad emission line profiles which are shifted into the IR spectra to constrain black hole masses. Then we fit an energy-conserving, three component accretion model of the broad-band spectral energy distribution (SED) to our multiwavelength data. 5 out of the 11 quasars show evidence of an SED peak, allowing us to constrain their bolometric luminosity from these models and estimate their mass accretion rates. Based on our limited sample, we suggest that estimating bolometric luminosities from L5100A˚L5100A˚ and L2-10 keV may be unreliable, as has been also noted for a low-redshift, X-ray selected active galactic nucleus sample.

Citation

Collinson, J., Ward, M., Done, C., Landt, H., Elvis, M., & McDowell, J. (2015). Reaching the peak of the quasar spectral energy distribution - I. Observations and models. Monthly Notices of the Royal Astronomical Society, 449(2), 2174-2193. https://doi.org/10.1093/mnras/stv362

Journal Article Type Article
Acceptance Date Feb 17, 2015
Online Publication Date Mar 30, 2015
Publication Date May 11, 2015
Deposit Date Mar 16, 2016
Publicly Available Date Mar 17, 2016
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 449
Issue 2
Pages 2174-2193
DOI https://doi.org/10.1093/mnras/stv362
Related Public URLs http://adsabs.harvard.edu/abs/2015MNRAS.449.2174C

Files

Published Journal Article (3.5 Mb)
PDF

Copyright Statement
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society ©: 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.







You might also like



Downloadable Citations