On the relation of mid-infrared emission with the gamma-ray properties of Fermi-detected BL Lac objects

	On the relation of mid-infrared emission with the gamma-ray properties of Fermi-detected BL Lac objects
	Mao LS(毛李胜)1,2,3
刊名	ASTROPHYSICS AND SPACE SCIENCE
	2012-08
卷号	340 期号:2 页码:331-349
关键词	BL Lacertae objects: general Infrared radiation Methods: statistical
ISSN号	0004-640X
通讯作者	Mao, LS (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	We present the Wide-field Infrared Survey Explorer (WISE) photometric data of 158 Fermi-detected BL Lacs and investigate the nature of their mid-infrared (MIR) continuum emission. In the [3.4]-[4.6]-[12] mu m color-color diagram, nearly all their colors lie within the WISE Blazar strip (WBS), which is an effective diagnostic tool to separate sources dominated by non-thermal radiation from those dominated by thermal radiation. This feature indicates that their MIR emission is predominantly non-thermal. This argument is further supported by the strong radio-MIR flux correlation. We derive their MIR spectral indices and compare them with the near-infrared (NIR) spectral indices. We find that there is a prevalent steepening from MIR spectrum to NIR spectrum. The low-frequency-peaked BL Lacs (LBLs) have on average a larger MIR spectral index and a higher MIR luminosity than the high-frequency-peaked BL Lacs (HBLs), and the intermediate-frequency-peaked BL Lacs (IBLs) appear to bridge them. The MIR-gamma-ray flux correlation is highly significant. A strong positive correlation is also found between the MIR and gamma-ray spectral indices. The gamma-ray-MIR loudness is significantly correlated with the synchrotron peak frequency. Finally we propose that the gamma-rays are highly associated with the MIR emission from the jet, and the gamma-ray emission is likely from the synchrotron self-Compton process for the Fermi-detected BL Lacs in our sample.
学科主题	Astronomy & Astrophysics
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 ; SPECTRAL ENERGY-DISTRIBUTIONS ; NEAR-INFRARED EMISSION ; POINT-SOURCE CATALOG ; SELF-COMPTON MODEL ; LACERTAE OBJECTS ; X-RAY ; LOUD BLAZARS ; BRIGHT BLAZARS
收录类别	SCI
原文出处	http://link.springer.com/article/10.1007%2Fs10509-012-1062-1
语种	英语
WOS记录号	WOS:000305784100012
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/7050]
专题	云南天文台_星系研究组
作者单位	1.National Astronomical Observatories/Yunnan Observatory, CAS, 650011, Kunming, China 2.Physics Department, Yunnan Normal University, 650500, Kunming, China 3.Graduate School of Chinese Academy of Sciences, 100049, Beijing, China
推荐引用方式 GB/T 7714	Mao LS. On the relation of mid-infrared emission with the gamma-ray properties of Fermi-detected BL Lac objects[J]. ASTROPHYSICS AND SPACE SCIENCE,2012,340(2):331-349.
APA	Mao LS.(2012).On the relation of mid-infrared emission with the gamma-ray properties of Fermi-detected BL Lac objects.ASTROPHYSICS AND SPACE SCIENCE,340(2),331-349.
MLA	Mao LS."On the relation of mid-infrared emission with the gamma-ray properties of Fermi-detected BL Lac objects".ASTROPHYSICS AND SPACE SCIENCE 340.2(2012):331-349.