NDLI: Fermi gamma-ray and multi-wave band emission from TeV active galactic nuclei

Content Provider	Springer Nature Link
Author	Xiong, Dingrong Zhang, Haojing Zhang, Xiong Zheng, Yonggang Liu, Wenguang Mao, Lisheng Huang, Bangrong Kang, Ting Cha, Yongjuan Guo, Fei
Copyright Year	2012
Abstract	Using γ-ray data detected by Fermi Large Area Telescope (LAT) and multi-wave band data for 40 TeV active galactic nuclei (AGNs), we have studied the correlations between flux densities (F R, F IR, F O, F X and F γ ) in the radio, infrared, optical, X-ray and γ-ray wave bands. Our results are the following: (1) For TeV HSP BL Lacertae objects (THBLs), there are strong correlations between F γ and F R and between F γ and F IR in all states (average/high/low); (2) The TeV radio galaxies (TRGs) deviate from the area occupied by THBLs; (3) The TeV flat-spectrum radio quasars (TFSRQs) have much stronger γ-ray emission than THBLs; (4) For THBLs, there are weak correlations between F γ and F X in all states as well as between F γ and F O in both average and high states, and a strong correlation between F γ and F O in the low state; (5) For THBLs, there are strong correlations between F O and F R in both low and average states as well as between F O and F IR in all states and between F IR and F R in all states, but no strong correlations among other bands are found. From these results, we suggest that for THBLs, the synchrotron self-Compton radiation (SSC) is the main mechanism of high energy γ-ray emission and the inverse Compton scattering of circum-nuclear dust is likely to be a important complementary mechanism. Compared with THBLs, TRGs and TFSRQs may have a different origin of high energy γ-ray.
Starting Page	345
Ending Page	360
Page Count	16
File Format	PDF
ISSN	0004640X
Journal	Astrophysics and Space Science
Volume Number	343
Issue Number	1
e-ISSN	1572946X
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-09-04
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Galaxies Active-gamma rays Radiation mechanisms-nonthermal Blazars Astrophysics and Astroparticles Astronomy, Observations and Techniques Cosmology Extraterrestrial Physics, Space Sciences Astrobiology
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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