IMPLICATIONS FOR THE BLAZAR SEQUENCE AND INVERSE COMPTON MODELS FROM FERMI BRIGHT BLAZARS

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	IMPLICATIONS FOR THE BLAZAR SEQUENCE AND INVERSE COMPTON MODELS FROM FERMI BRIGHT BLAZARS
	Chen L(陈亮)1,2,3,4 ; Bai JM(白金明)1,3
刊名	ASTROPHYSICAL JOURNAL
	2011-07-10
卷号	735 期号:2
关键词	BL Lacertae objects: general galaxies: jets quasars: general radiation mechanisms: non-thermal
ISSN号	0004-637X
通讯作者	Chen, L (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	In this paper, we use the quasi-simultaneous spectra of Fermi bright blazars and Fermi-detected narrow-line Seyfert 1 (NLS1) to study the blazar sequence and inverse Compton models. (1) The synchrotron peak luminosities (Ls) significantly correlate inversely with the synchrotron peak frequencies (v(s)), L-s proportional to v(s) (0.44 +/- 0.11), which is consistent with the blazar sequence. In addition to the correlation, there are some blazars showing low v(s) and low L-s. To study the relation between these low-v(s)-low-L-s blazars and the blazar sequence, we present correlations of the parameter L(s)v(s)(1/4) with the ratio of Compton to synchrotron peak frequencies (r(Cs) equivalent to v(C)/v(s)) and with the ratio of Compton to synchrotron luminosities (CD equivalent to L-C/L-s). The results indicate that both correlations are significant with a Pearson's probability for a null correlation of p = 0.0218 and p = 0.0286, respectively. This does not support the idea that the low-v(s)-low-L-s blazars are sources with less beaming. Another possibility, as suggested by Ghisellini & Tavecchio, is that these blazars have relatively lower black holemasses. To test this, we collect the black holemasses of 30 blazars from archives and find that the black hole mass correlates with the parameter L(s)v(s)(0.44) (p = 0.0344). Therefore, the black hole masses of low-v(s)-low-L-s blazars are statistically small. The NLS1s are thought to have lower black hole masses. We find that the four NLS1s detected by Fermi have low v(s) and low L-s. This supports the above result. (2) The ratio r(Cs) correlates with CD significantly (p = 0.00375). The external Compton model can naturally explain this correlation, while the synchrotron self-Compton model cannot. This agrees with the findings of many authors that the EC process dominates the gamma-ray emission of flat spectrum radio quasars.
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 ; BLACK-HOLE MASSES ; BL-LACERTAE OBJECTS ; LINE SEYFERT 1 ; SPECTRAL ENERGY-DISTRIBUTIONS ; LARGE-AREA TELESCOPE ; GAMMA-RAY EMISSION ; RELATIVISTIC JETS ; PMN J0948+0022 ; HOST GALAXIES
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/0004-637X/735/2/108/meta
语种	英语
WOS记录号	WOS:000292089700041
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5406]
专题	云南天文台_丽江天文观测站（南方基地）云南天文台_中国科学院天体结构与演化重点实验室
作者单位	1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China 2.Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, China 3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China 4.The Graduate School of Chinese Academy of Sciences, Beijing 100049, China
推荐引用方式 GB/T 7714	Chen L,Bai JM. IMPLICATIONS FOR THE BLAZAR SEQUENCE AND INVERSE COMPTON MODELS FROM FERMI BRIGHT BLAZARS[J]. ASTROPHYSICAL JOURNAL,2011,735(2).
APA	Chen L,&Bai JM.(2011).IMPLICATIONS FOR THE BLAZAR SEQUENCE AND INVERSE COMPTON MODELS FROM FERMI BRIGHT BLAZARS.ASTROPHYSICAL JOURNAL,735(2).
MLA	Chen L,et al."IMPLICATIONS FOR THE BLAZAR SEQUENCE AND INVERSE COMPTON MODELS FROM FERMI BRIGHT BLAZARS".ASTROPHYSICAL JOURNAL 735.2(2011).