Correlated radio and optical variations in a sample of active galactic nuclei

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

64

Active Galactic Nuclei, Bl Lacertae Objects, Quasars, Radio Observation, Statistical Correlation, Variability, Visual Observation, Astronomical Photometry, Data Correlation, Light Curve, Radiant Flux Density, Submillimeter Waves

Scientific paper

We have studied flux variations in the optical and at radio wavelengths of a sample of extragalactic sources. Even though similar analyses have been done ealier, this is the first extensive study of connections between long-term optical and high ratio frequency (from 22 GHz up to 230 GHz) variability in a large sample (22 sources) of active galactic nuclei (AGN). For the correlation analysis we used the discrete correlation function complemented by visual comparison and concentrated on finding correlations with time delays of about 1000 days and less, since any time delays longer than some hundred days are very hard to verify. In 10 out of the 22 sources we found a clear radio-optical correlation, and in as many as 6 sources the optical and high frequency radio variability was simultaneous. We suggest that the main reason for not finding significant correlations in the rest of the sample sources is the lack of sufficient radio and especially optical data.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Correlated radio and optical variations in a sample of active galactic nuclei 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 Correlated radio and optical variations in a sample of active galactic nuclei, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Correlated radio and optical variations in a sample of active galactic nuclei will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1786626

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.