2MASS observation of BL Lac objects II

doi:10.1016/j.newast.2011.05.002

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	2MASS observation of BL Lac objects II
	Mao LS(毛李胜)1,2,3 ; Mao, LS (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
发表期刊	NEW ASTRONOMY
	2011-12
卷号	16 期号:8 页码:503-529
DOI	10.1016/j.newast.2011.05.002
产权排序	第1完成单位
收录类别	SCI
关键词	Bl Lacertae Objects Infrared
摘要	In this paper, we have searched for the Two Micron All Sky Survey (2MASS) counterparts of 1434 BL Lacs. Eight hundred and thirty-three of 1434 BL Lacs (similar to 58%) have spatially coincident 2MASS counterparts. Fermi-detected BL Lacs (FBLs) have a much higher 2MASS detection rate than non-Fermi-detected BL Lacs (non-FBLs) (similar to 95% vs 49%). We compare the near-infrared (NIR) apparent magnitudes, monochromatic luminosities and spectral indices of different subclasses of BL Lacs: (i) FBLs are significantly brighter and more luminous than non-FBLs; (ii) low-energy peaked BL Lacs (LBLs) are significantly more luminous than high-energy peaked BL Lacs (HBLs); (iii) the NIR spectral index, alpha(IR), shows a sequence of decrease from LBLs to intermediate-energy peaked BL Lacs (IBLs) then to HBLs. The K-S band luminosity and NIR spectral index are both strongly anti-correlated with the synchrotron peak frequency (v(peak)). About 66% of BL Lacs in our sample are located close to the power law line in the J-H-H-K-S diagram, which implies predominantly non-thermal radiation in the NIR range. We label 218 BL Lacs whose NIR spectra show convex curvatures probably due to the significant contaminations of host-galaxy starlight. Finally we investigate the correlation between NIR and gamma-ray emission using the 2MASS observational data. (C) 2011 Elsevier B.V. All rights reserved.
项目资助者	National Aeronautics and Space Administration ; National Science Foundation ; Educational Commission of Yunnan Province of China [07Y10198]
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	1384-1076
URL	查看原文
归档日期	2012-07-09
WOS记录号	WOS:000293117000005
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	RAY-LOUD BLAZARS ; SPECTRAL ENERGY-DISTRIBUTIONS ; ACTIVE GALACTIC NUCLEI ; LARGE-AREA TELESCOPE ; NEAR-INFRARED OBSERVATIONS ; SELF-COMPTON MODEL ; ALL-SKY SURVEY ; LACERTAE OBJECTS ; GAMMA-RAY ; X-RAY
引用统计	被引频次：25[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/7049
专题	星系研究组
通讯作者	Mao, LS (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
作者单位	1.National Astronomical Observatories/Yunnan Observatory, CAS, Kunming 650011, China 2.Graduate School of Chinese Academy of Sciences, Beijing 100039, China 3.Department of Physics, Yunnan Normal University, Kunming 650092, China
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Mao LS,Mao, LS . 2MASS observation of BL Lac objects II[J]. NEW ASTRONOMY,2011,16(8):503-529.
APA	Mao LS,&Mao, LS .(2011).2MASS observation of BL Lac objects II.NEW ASTRONOMY,16(8),503-529.
MLA	Mao LS,et al."2MASS observation of BL Lac objects II".NEW ASTRONOMY 16.8(2011):503-529.

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