On the intrinsic shape of the gamma-ray spectrum
for Fermi blazars
Shi-Ju Kang;Zhi-Bin Zhang;Lin-Hui Wu;Qingwen Wu;Yong-Gang Zheng;Yue Yin;Jia-Li Song;Hang Zou;Jian-Chao Feng;Ai-Jun Dong;Zhong-Zu Wu
【期刊名称】《天文和天体物理学研究》 【年(卷),期】2018(018)005
【摘要】The curvature of the γ-ray spectrum in blazars may reflect the intrinsic distribution of emitting electrons,which will further give some information on the possible acceleration and cooling processes in the emitting region.The γ-ray spectra of Fermi blazars are normally fitted either by a single power-law (PL) or a log-normal (call Logarithmic Parabola,LP) form.The possible reason for this difference is not clear.We statistically explore this issue based on the different observational properties of 1419 Fermi blazars in the 3LAC Clean Sample.We find that the γ-ray flux (100 MeV-100 GeV) and variability index follow bimodal distributions for PL and LP blazars,where the γ-ray flux and variability index show a positive correlation.However,the distributions of γ-ray luminosity and redshift follow a unimodal distribution.Our results suggest that the bimodal distribution of γ-ray fluxes for LP and PL blazars may not be intrinsic and all blazars may have an intrinsically curved γ-ray spectrum,and the PL spectrum is just caused by the fitting effect due to less photons.
【总页数】6页(141-146) 【关键词】
【作者】Shi-Ju Kang;Zhi-Bin Zhang;Lin-Hui Wu;Qingwen Wu;Yong-Gang Zheng;Yue
Yin;Jia-Li
Song;Hang
Zou;Jian-Chao
Feng;Ai-Jun
Dong;Zhong-Zu Wu
【作者单位】School of Electrical Engineering, Liupanshui Normal University, Liupanshui 553004, China;Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing;Department of Physics, College of Science, Guizhou University, Guiyang 550025, China;School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China;School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China;Department of Physics, Yunnan Normal University, Kunming 650092, China;School of Electrical Engineering, Liupanshui Normal University, Liupanshui 553004, China;School of Electrical Engineering, Liupanshui Normal University, Liupanshui 553004, China;School of Electrical Engineering, Liupanshui Normal University, Liupanshui 553004, China;School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550001, China;Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing;School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550001, China;Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing;Department of Physics, College
of Science, Guizhou University, Guiyang 550025, China 【正文语种】英文 【中图分类】 【文献来源】
https://www.zhangqiaokeyan.com/academic-journal-cn_research-astronomy-astrophysics_thesis/0201254254271.html 【相关文献】
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On the intrinsic shape of the gamma-ray spectrum for Fermi blazars
