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Variability and beaming effect in blazars

by Dr. Junhui Fan (Center for Astrophysics, Guangzhou University)

Dec 02, 2013 from 02:30 PM to 04:30 PM

Where IRA meeting room, 4th floor, via Gobetti, 101, Bologna

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Abstract:

In this talk, I will present the radio and optical variabilities, the beaming effect, and the determination of relativistic beaming factors of Fermi loud blazars.

We found that 1) the time scales for blazars are in the range of about 2 years to about 20 years in the radio bands, long-term time scales are also investigated in the optical bands for some blazars, 2) the Fermi detected blazars are more core-dominated than the non-Fermi detected blazars.

There is a close correlation between the ratio of the gamma-ray luminosity, Lγ to the extended radio luminosity, L_Ext, involving log (Lγ/L_(Ext) and log (1+R), where R is the core-dominance parameter. Some beaming effects are also discussed.

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