Lognormal variability in BL Lacertae

Details Lognormal variability in BL Lacertae Lognormal variability in BL Lacertae

2009-07-14

arxiv.org/abs/0907.2425v1

A&A (2009) 503, 797-799

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Accepted for Astronomy & Astrophysics

Scientific paper

10.1051/0004-6361/200912303

X-ray data from the blazar BL Lac are used to investigate the nature of its variability, and more precisely the flux dependency of the variability and the distribution of fluxes. The variations in the flux are found to have a lognormal distribution and the average amplitude of variability is proportional to the flux level. BL Lac is the first blazar in which lognormal X-ray variability is clearly detected. Lognormal variability in X-ray light curves, probably related to accretion disk activity, has been discovered in various compact systems, such as Seyfert galaxies and X-ray binaries. The light curve is orders of magnitude less variable than other blazars, with few bursting episodes. If this defines a specific state of the source, then the lognormality might be the imprint of the accretion disk on the jet, linking for the first time accretion and jet properties in a blazar.

Affiliated with

Also associated with

No associations

Rating

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

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-332353