SPECTROSCOPY OF BROAD-LINE BLAZARS FROM 1LAC

By M. Shaw, R. Romani, G. Cotter, S. E. Healey, P. Michelson, A. Readhead, J. Richards, W. Max-Moerbeck, O. King, W. Potter. 2012

162 citations recorded by the source corpus.

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.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/c04cc2eb3c40d12b05e70c324373d81e0eb08367

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. E. Orlando
2. M. Lister
3. Y. Kovalev
4. T. Savolainen
5. A. Pushkarev
6. Anna Franckowiak
7. D. Homan
8. Troy A. Porter

In Nuclear and High Energy Physics

1. Anna Franckowiak
2. E. Orlando
3. M. Lister
4. Y. Kovalev
5. T. Savolainen
6. A. Pushkarev
7. D. Homan
8. Troy A. Porter

Citations in the corpus

• 3FHL: The Third Catalog of Hard Fermi-LAT Sources (2017, methodology): “The associated blazars were optically classified as flatspectrum radio quasars (FSRQs), BL Lacs, and blazars of unknown types (BCUs, Shaw et al. 2012, 2013).”
• 2FHL: THE SECOND CATALOG OF HARD FERMI-LAT SOURCES (2015, background): “Spectroscopic redshift measurements exists in the literature (e.g., Shaw et al. 2012, 2013; Masetti et al. 2013) for 43% (128) of the 299 extragalactic sources.”
• MOJAVE. XIII. PARSEC-SCALE AGN JET KINEMATICS ANALYSIS BASED ON 19 YEARS OF VLBA OBSERVATIONS AT 15 GHz (2016, background): “0109+224 (S2 0109+22) : The redshift z = 0.265 from Shaw et al. (2012) is claimed to be incorrect according to Paiano et al. (2016), who find a lower limit of z > 0.35, based on new optical spectroscopy.”
• SPECTROSCOPY OF THE LARGEST EVER γ-RAY-SELECTED BL LAC SAMPLE (2013, background): “In a companion paper (Shaw et al. 2012, hereafter S12), we reported on measurements of a large fraction of the FSRQ.”
• THE COSMIC EVOLUTION OF FERMI BL LACERTAE OBJECTS (2013, result): “The source classifications reported in Table 1 are originally drawn from the 1LAC and 2LAC catalogs (Abdo et al. 2010d), and have been complemented with newer observations reported in Shaw et al. (2012) and Shaw et al. (2013b).”
• THE LUMINOSITY FUNCTION OF FERMI-DETECTED FLAT-SPECTRUM RADIO QUASARS (2011, background): “Note that all of the associations with an FSRQ designation have spectroscopically measured redshifts either from the literature or from recent spectroscopic studies (Shaw et al. 2012).”