The longer optical time scales of a large sample of quasars

Details The longer optical time scales of a large sample of quasars The longer optical time scales of a large sample of quasars

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....105..437s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 105, no. 2, p. 437-455.

Astronomy and Astrophysics

Astronomy

63

Active Galactic Nuclei, Light Curve, Quasars, Time Series Analysis, Blazars, Optical Properties, Stellar Magnitude

Scientific paper

Of a carefully studied sample of 60 quasars, 75 percent displayed evidence of long-term changes in the base levels of their optical fluxes. Internally consistent light curves were analyzed by three different methods in an effort to assign time scales to these changes. The familiar rapid, large-amplitude flares were specifically excluded from the study. The majority of the observed time scales range from 3 to 15 yr, but when they are translated into the rest frames of the objects, there is a strong concentration between 2 and 6 yr. Extensive testing showed that the lengths of the data runs, largely 17 to 21 yr, did not exert a major influence on the estimation of the time scales. Several accepted source mechanisms appear to be capable of generating variations with appropriate time scales.

Affiliated with

Also associated with

No associations

Rating

The longer optical time scales of a large sample of quasars 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 longer optical time scales of a large sample of quasars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The longer optical time scales of a large sample of quasars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1272240