Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published March 20, 2012 | Published
Journal Article Open

Spectroscopy of Broad-Line Blazars from 1LAC


We report on optical spectroscopy of 165 flat spectrum radio quasars (FSRQs) in the Fermi 1LAC sample, which have helped allow a nearly complete study of this population. Fermi FSRQs show significant evidence for non-thermal emission even in the optical; the degree depends on the γ-ray hardness. They also have smaller virial estimates of hole mass than the optical quasar sample. This appears to be largely due to a preferred (axial) view of the γ-ray FSRQ and non-isotropic (H/R ~ 0.4) distribution of broad-line velocities. Even after correction for this bias, the Fermi FSRQs show higher mean Eddington ratios than the optical population. A comparison of optical spectral properties with Owens Valley Radio Observatory radio flare activity shows no strong correlation.

Additional Information

© 2012 American Astronomical Society. Received 2011 October 12; accepted 2011 December 21; published 2012 March 5. The Hobby–Eberly Telescope (HET) is a joint project of the University of Texas at Austin, the Pennsylvania State University, Stanford University, Ludwig-Maximilians-Universitaet Muenchen, and Georg-August-Universitaet Goettingen. The HET is named in honor of its principal benefactors, William P. Hobby and Robert E. Eberly. The Marcario Low Resolution Spectrograph is named for Mike Marcario of High Lonesome Optics, who fabricated several optics for the instrument but died before its completion. The LRS is a joint project of the Hobby–Eberly Telescope partnership and the Instituto de Astronoma de la Universidad Nacional Autonoma de Mexico. Based on observations made with ESO Telescopes at the La Silla Paranal Observatory under programme 077.B-0056 078.B- 0275 079.B-0831 083.B-0460 084.B-0711 087.A-0573. G.C. acknowledges support from STFC grant ST/H002456/1 We acknowledge support fromNASAgrantsNNX09AW30G, NXX10AU09G, and NAS5-00147. A.C.S.R. is also supported under grant AST-0808050. Facilities: Fermi, Hale (DBSP), HET, Keck:I (LRIS), NTT, VLT:Antu (FORS2)

Attached Files

Published - Shaw2012p17805Astrophys_J.pdf


Files (799.1 kB)
Name Size Download all
799.1 kB Preview Download

Additional details

August 22, 2023
October 17, 2023