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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
DOI10.1016/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
ISSN1384-1076
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
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被引频次:15[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
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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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