Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2011-10-27
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
2011 Fermi Symposium proceedings - eConf C110509
Scientific paper
The optical properties of the z = 0.435 quasar PKS 1222+216 (4C+21.35) are summarized since the discovery of impressive gamma-ray activity in this source by Fermi/LAT. Unlike several other gamma-ray-bright blazars, there appears to be little connection between optical and gamma-ray activity. Spectropolarimetry shows this object to be a composite system with optical emission from both a polarized, variable synchrotron power-law and unpolarized light from a stable blue continuum source (+broad emission-line region) contributing to the observed spectrum. Spectrophotometry over a period of about two years does not detect significant variability in the strong, broad emission lines, despite large optical continuum variations. This suggests that the relativistic jet has little influence on the output of the broad emission-line region, possibly either because the highly beamed continuum ionizes only a small portion of the line-emitting gas, or the observed non-thermal continuum originates parsecs downstream from the base of the jet, further away from the central engine than the broad emission-line region.
Jannuzi Buell Tomasson
Schmidt Gary D.
Smith Paul S.
No associations
LandOfFree
The Optical Properties of PKS 1222+216 During the Fermi Mission does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Optical Properties of PKS 1222+216 During the Fermi Mission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Optical Properties of PKS 1222+216 During the Fermi Mission will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-375820