Optical and radio variability in blazars

Details Optical and radio variability in blazars Optical and radio variability in blazars

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...386..473h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 386, Feb. 20, 1992, p. 473-484. Research supported by National Radio Astron

Statistics

Computation

112

Bl Lacertae Objects, Blazars, Galactic Nuclei, Galactic Radiation, Radio Galaxies, Computational Astrophysics, Continuous Radiation, Cross Correlation, Light (Visible Radiation), Radiant Flux Density

Scientific paper

An analysis is presented of the optical (0.44 micron) and radio flux density variations (4.8, 8.0, and 14.5 GHz) of the five best observed variable AGN, of which three are BL Lac objects and two are optically violent variable (OVV) quasars. For each object the nature of the variability at individual wavelengths is determined by using a structure function analysis and the autocorrelation function as calculated from the discrete correlation technique. Both techniques yield similar results, showing that the optical variations are similar for all objects and are a combination of flicker and shot noise. The radio variability is distinct, being described by shot noise (less variation at short times), with the two OVVs exhibiting the most extreme behavior. The time lag between the variations at the three radio frequencies and the optical flux is studied with the discrete cross-correlation function and the mean variance methods. It is concluded that the optical and radio emitting regions are physically related, exist on distinct time scales, and excite their synchrotron emitting plasmas differently.

Affiliated with

Also associated with

No associations

Rating

Optical and radio variability in blazars 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 Optical and radio variability in blazars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical and radio variability in blazars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1046530