Correlation between the Gamma-ray and the Near-infrared Emissions from Gamma-ray-loud Blazars in the Low State |
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Authors: | X Zhang KS Cheng G Zhao SM Hu |
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Institution: | (1) Department of physics, Yunnan Normal University, Kunming, China;(2) National Astronomical Observatory, Chinese Academy of Science, Beijing, China |
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Abstract: | We have studied the correlations between the near-IR and the γ-ray bands using 29 observed γ-ray-loud blazars (16 BL Lac objects
and 13flat-spectrum radio quasars (FSRQs)) with near-IR and γ-ray spectralindices and fluxes. The results show that there
are very strong correlations between near-IR mean spectral index αIR and γ-ray mean spectral index αγ and between near-IR and γ-ray fluxes. Which means that γ-ray radiation from the blazars should be mainly produced by the
synchrotron self-Compton process. In addition, the γ-ray emission of BL Lac objects may be somewhat different from flat-spectrum
radio quasars.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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