The connection between radio and gamma-ray emission in Fermi/LAT blazars

	The connection between radio and gamma-ray emission in Fermi/LAT blazars
	Fan, Xu-Liang 1,2,4; Bai, Jin-Ming 1,2; Liu, Hong-Tao 1,2; Chen, Liang3 ; Liao, Neng-Hui 1,2,4
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2012-11-01
卷号	12 期号:11 页码:1475-1485
关键词	BL Lacertae objects: general galaxies: jets quasars: general radio continuum: galaxies gamma rays: observations
英文摘要	We collect the second Large Area Telescope AGN catalog (2LAC) and Monitor of Jets in AGN with VLBA Equipment (MOJAVE) quasi-simultaneous data to investigate the radio-gamma connection of blazars. The cross sample contains 166 sources. The statistical analysis based on this sample confirms positive correlations between these two bands, but the correlations become weaker as the gamma-ray energy increases. The statistical results between various parameters show negative correlations of gamma-ray photon spectral index with gamma-ray loudness for both Flat Spectrum Radio Quasars (FSRQs) and BL Lacertae objects, positive correlations of gamma-ray variability index with the gamma-ray loudness for FSRQs, a negative correlation of the gamma-ray variability index with the gamma-ray photon spectral index for FSRQs, and negative correlations of gamma-ray photon spectral index with gamma-ray luminosity for FSRQs. These results suggest that the gamma-ray variability may be due to changes inside the gamma-ray emission region like the injected power, rather than changes in the photon density of the external radiation fields, and the variability amplitude tends to be larger as the gamma-rays are closer to the high energy peak of the spectral energy distribution (SED). No correlation of variability index found for BL Lacertae objects implies that variability behavior may differ below and above the peak energy.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	LARGE-AREA TELESCOPE ; ACTIVE GALACTIC NUCLEI ; JET ; CATALOG ; VARIABILITY ; PROGRAM ; FLARES ; ERA
收录类别	SCI
语种	英语
WOS记录号	WOS:000311523700003
公开日期	2015-01-28
内容类型	期刊论文
源URL	[http://119.78.226.72//handle/331011/15471]
专题	上海天文台_星系宇宙学重点实验室
作者单位	1.Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China 2.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Peoples R China 3.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 4.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Fan, Xu-Liang,Bai, Jin-Ming,Liu, Hong-Tao,et al. The connection between radio and gamma-ray emission in Fermi/LAT blazars[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2012,12(11):1475-1485.
APA	Fan, Xu-Liang,Bai, Jin-Ming,Liu, Hong-Tao,Chen, Liang,&Liao, Neng-Hui.(2012).The connection between radio and gamma-ray emission in Fermi/LAT blazars.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,12(11),1475-1485.
MLA	Fan, Xu-Liang,et al."The connection between radio and gamma-ray emission in Fermi/LAT blazars".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 12.11(2012):1475-1485.