The broad band spectral index of blazars in a low state

Details The broad band spectral index of blazars in a low state The broad band spectral index of blazars in a low state

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007ap%26ss.310....1z&link_type=abstract

Astrophysics and Space Science, Volume 310, Issue 1-2, pp. 1-12

Astronomy and Astrophysics

Astrophysics

3

Blazars, General-Radiation Mechanisms, The Broad Band Spectral Index

Scientific paper

Using the broad band spectral index of 164 blazars in a low state, we studied the possible correlation between different broad band spectral index (α r.ir , α r.o , α r.x , α r.γ , α ir.o , α ir.x , α ir.γ , α o.x , α o.γ , α x.γ ). We also studied the possible correlation between different broad band spectral index of high-frequency peaked Bl Lac object (HBL), low-frequency peaked BL Lac object (LBL) and flat spectral radio quasars (FSRQs), respectively. The strong anti-correlations were found between α r.o and α o.γ , between α r.o and α x.γ in a low state for our blazar sample. For LBL and FSRQs, the strong anti-correlations were found between α r.ir and α ir.x , between α r.o and α o.x , and between α r.o and α o.γ in a low state. Based on these results, we suggested that the seed photons of the γ-ray drive from both the jet and the external accretion disk or the broad-line region, and that the subclasses of blazars seem to the different emission mechanism.

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