MULTIWAVELENGTH VARIABILITY PROPERTIES OF FERMI BLAZAR S5 0716+714

	MULTIWAVELENGTH VARIABILITY PROPERTIES OF FERMI BLAZAR S5 0716+714
	Liao, N. H.1,2,3; Bai, J. M.1,2; Liu, H. T.1,2; Weng, S. S.4; Chen, Liang5 ; Li, F.1,2
刊名	ASTROPHYSICAL JOURNAL
	2014-03-10
卷号	783 期号:2 页码:83(16pp)
关键词	BL Lacertae objects: individual galaxies: active galaxies: jets radiation mechanisms: non-thermal
通讯作者	陈亮
英文摘要	S5 0716+714 is a typical BL Lacertae object. In this paper we present the analysis and results of long-term simultaneous observations in the radio, near-infrared, optical, X-ray, and gamma-ray bands, together with our own photometric observations for this source. The light curves show that the variability amplitudes in gamma-ray and optical bands are larger than those in the hard X-ray and radio bands and that the spectral energy distribution (SED) peaks move to shorter wavelengths when the source becomes brighter, which is similar to other blazars, i. e., more variable at wavelengths shorter than the SED peak frequencies. Analysis shows that the characteristic variability timescales in the 14.5 GHz, the optical, the X-ray, and the gamma-ray bands are comparable to each other. The variations of the hard X-ray and 14.5 GHz emissions are correlated with zero lag, and so are the V band and gamma-ray variations, which are consistent with the leptonic models. Coincidences of gamma-ray and optical flares with a dramatic change of the optical polarization are detected. Hadronic models do not have the same natural explanation for these observations as the leptonic models. A strong optical flare correlating a. -ray flare whose peak flux is lower than the average flux is detected. The leptonic model can explain this variability phenomenon through simultaneous SED modeling. Different leptonic models are distinguished by average SED modeling. The synchrotron plus synchrotron selfCompton (SSC) model is ruled out because of the extreme input parameters. Scattering of external seed photons, such as the hot-dust or broad-line region emission, and the SSC process are probably both needed to explain the gamma-ray emission of S5 0716+714.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	ACTIVE GALACTIC NUCLEI ; LARGE-AREA TELESCOPE ; BL-LACERTAE OBJECTS ; TERM OPTICAL VARIABILITY ; RAPID TEV VARIABILITY ; RAY BRIGHT BLAZARS ; LAC OBJECTS ; INTRADAY VARIABILITY ; GAMMA-RAYS ; PHYSICAL-PROPERTIES
收录类别	SCI
语种	英语
WOS记录号	WOS:000335439900019
公开日期	2015-02-14
内容类型	期刊论文
源URL	[http://119.78.226.72//handle/331011/15728]
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, Kunming 650011, Yunnan, Peoples R China 2.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Yunnan, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Xiangtan Univ, Dept Phys, Xiangtan 411105, Peoples R China 5.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
推荐引用方式 GB/T 7714	Liao, N. H.,Bai, J. M.,Liu, H. T.,et al. MULTIWAVELENGTH VARIABILITY PROPERTIES OF FERMI BLAZAR S5 0716+714[J]. ASTROPHYSICAL JOURNAL,2014,783(2):83(16pp).
APA	Liao, N. H.,Bai, J. M.,Liu, H. T.,Weng, S. S.,Chen, Liang,&Li, F..(2014).MULTIWAVELENGTH VARIABILITY PROPERTIES OF FERMI BLAZAR S5 0716+714.ASTROPHYSICAL JOURNAL,783(2),83(16pp).
MLA	Liao, N. H.,et al."MULTIWAVELENGTH VARIABILITY PROPERTIES OF FERMI BLAZAR S5 0716+714".ASTROPHYSICAL JOURNAL 783.2(2014):83(16pp).