The optical spectral slope variability of 17 blazars
The optical spectral slope variability of 17 blazars
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17 个耀变体的光谱斜率变化
DOI：
10.1111/j.1365-2966.2006.10721.x
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发表时间：
2006-09
影响因子：
4.8
通讯作者：
S.M. Hu
中科院分区：
文献类型：
--
作者：
G. Zhao;S.M. Hu
Many quasi-simultaneous optical observations of 17 blazars are obtained from previous papers published over the last 19 years in order to investigate the spectral slope variability and understand the radiation mechanism of blazars. The long-period dereddened optical spectral slopes are calculated. We analyse the average spectral slope distribution, which suggests that the spectra of flat spectrum radio quasars (FSRQs) and high energy peaked BL Lac objects (HBLs) are probably deformed by other emission components. The average spectral slopes of low energy peaked BL Lac objects(LBLs), which scatter around 1.5, show a good accordance with the synchrotron self-Compton (SSC) loss-dominated model. We present and discuss the variability between the spectral slope and optical luminosity. The spectra of all HBLs and LBLs get flatter when they turn brighter, while for FSRQs this trend does not exist or may even be reversed. This phenomenon may imply that there is a thermal contribution to the optical spectrum for FSRQs. For the FSRQ 1156+295, there is a hint that the slope gets flatter at both the brightest and faintest states. Our result shows that three subclasses locate in different regions in the pattern of slope variability indicator versus average spectral slope. The relativistic jet mechanism is supported by the significant correlation between the optical Doppler factor and the average spectral slope.
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DOI：
10.1088/1009-9271/5/5/004
发表时间：
2005-10
期刊：
Chinese Journal of Astronomy and Astrophysics
影响因子：
--
作者：
G. Xie;Luo Chen;Huai-zhen Li;L. Mao;H. Dai;Z. Xie;Li Ma;SB Zhou
通讯作者：
G. Xie;Luo Chen;Huai-zhen Li;L. Mao;H. Dai;Z. Xie;Li Ma;SB Zhou
DOI：
10.1086/324134
发表时间：
2001-06
期刊：
The Astrophysical Journal
影响因子：
--
作者：
M. Böttcher;C. Dermer
通讯作者：
M. Böttcher;C. Dermer
DOI：
10.1051/aas:1998215
发表时间：
1998-05
期刊：
Astronomy & Astrophysics Supplement Series
影响因子：
--
作者：
G. Tosti;M. Fiorucci;M. Luciani;N. Rizzi;M. Villata;C. Raiteri;G. D. Francesco;L. Lanteri;M. Chiaberge;A. Peila;M. Cavallone;G. Sobrito;M. Maesano;E. Massaro;F. Montagni;R. Nesci;G. Ghisellini;L. Takalo;A. Sillanpää;S. Katajainen;P. Heinämäki;K. Nilsson;T. Pursimo
通讯作者：
G. Tosti;M. Fiorucci;M. Luciani;N. Rizzi;M. Villata;C. Raiteri;G. D. Francesco;L. Lanteri;M. Chiaberge;A. Peila;M. Cavallone;G. Sobrito;M. Maesano;E. Massaro;F. Montagni;R. Nesci;G. Ghisellini;L. Takalo;A. Sillanpää;S. Katajainen;P. Heinämäki;K. Nilsson;T. Pursimo
影响因子：
8.7
作者：
G. Xie;K. H. Li;F. K. Liu;R. Lu;J. X. Wu;J. H. Fan;Y. Y. Zhu-Y.;F. Cheng
通讯作者：
G. Xie;K. H. Li;F. K. Liu;R. Lu;J. X. Wu;J. H. Fan;Y. Y. Zhu-Y.;F. Cheng
影响因子：
6.5
作者：
M. Fiorucci;S. Ciprini;G. Tosti
通讯作者：
M. Fiorucci;S. Ciprini;G. Tosti