BLAZAR ANTI-SEQUENCE OF SPECTRAL VARIATION WITHIN INDIVIDUAL BLAZARS: CASES FOR MRK 501 AND 3C 279

	BLAZAR ANTI-SEQUENCE OF SPECTRAL VARIATION WITHIN INDIVIDUAL BLAZARS: CASES FOR MRK 501 AND 3C 279
	Zhang, Jin1,2 ; Zhang, Shuang-Nan 1,3; Liang, En-Wei 1,4,5
刊名	ASTROPHYSICAL JOURNAL
	2013-04-10
卷号	767 期号:1
关键词	BL Lacertae objects: individual (Mrk 501) gamma rays: galaxies radiation mechanisms: non-thermal quasars: individual (3C 279)
英文摘要	The jet properties of Mrk 501 and 3C 279 are derived by fitting broadband spectral energy distributions (SEDs) with lepton models. The derived gamma(b) (the break Lorenz factor of the electron distribution) is 10(4)-10(6) for Mrk 501 and 200 similar to 600 for 3C 279. The magnetic field strength (B) of Mrk 501 is usually one order of magnitude lower than that of 3C 279, but their Doppler factors (delta) are comparable. A spectral variation feature where the peak luminosity is correlated with the peak frequency, which is opposite from the blazar sequence, is observed in the two sources. We find that (1) the peak luminosities of the two bumps in the SEDs for Mrk 501 depend on gamma(b) in both the observer and co-moving frames, but they are not correlated with B and delta and (2) the luminosity variation of 3C 279 is dominated by the external Compton (EC) peak and its peak luminosity is correlated with gamma(b) and d, but anti-correlated with B. These results suggest that gamma(b) may govern the spectral variation of Mrk 501 and delta and B would be responsible for the spectral variation of 3C 279. The narrow distribution of gamma b and the correlation of gamma b and B in 3C 279 would be due to the cooling from the EC process and the strong magnetic field. Based on our brief discussion, we propose that this spectral variation feature may originate from the instability of the corona but not from the variation of the accretion rate as does the blazar sequence.
收录类别	SCI
语种	英语
WOS记录号	WOS:000316947500008
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5823]
专题	国家天文台_空间科学研究部
作者单位	1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Peoples R China 3.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China 4.Guangxi Univ, Dept Phys, Nanning 530004, Peoples R China 5.Guangxi Univ, GXU NAOC Ctr Astrophys & Space Sci, Nanning 530004, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Jin,Zhang, Shuang-Nan,Liang, En-Wei. BLAZAR ANTI-SEQUENCE OF SPECTRAL VARIATION WITHIN INDIVIDUAL BLAZARS: CASES FOR MRK 501 AND 3C 279[J]. ASTROPHYSICAL JOURNAL,2013,767(1).
APA	Zhang, Jin,Zhang, Shuang-Nan,&Liang, En-Wei.(2013).BLAZAR ANTI-SEQUENCE OF SPECTRAL VARIATION WITHIN INDIVIDUAL BLAZARS: CASES FOR MRK 501 AND 3C 279.ASTROPHYSICAL JOURNAL,767(1).
MLA	Zhang, Jin,et al."BLAZAR ANTI-SEQUENCE OF SPECTRAL VARIATION WITHIN INDIVIDUAL BLAZARS: CASES FOR MRK 501 AND 3C 279".ASTROPHYSICAL JOURNAL 767.1(2013).