Spectral energy distribution variation in BL Lacs and flat spectrum radio quasars

被引：20

作者：

Rani, Bindu ^{[1
,2
,3
,4
]}

Gupta, Alok C. ^{[1
,2
]}

Bachev, R. ^{[3
,4
]}

Strigachev, A. ^{[3
,4
]}

Semkov, E. ^{[3
,4
]}

D'Ammando, F. ^{[5
]}

Wiita, P. J. ^{[6
]}

Gurwell, M. A. ^{[7
]}

Ovcharov, E. ^{[8
]}

Mihov, B. ^{[3
,4
]}

Boeva, S. ^{[3
,4
]}

Peneva, S. ^{[3
,4
]}

机构：

[1] Aryabhatta Res Inst Observat Sci ARIES, Naini Tal 263129, India

[2] DDU Gorakhpur Univ, Dept Phys, Gorakhpur 273009, Uttar Pradesh, India

[3] Bulgarian Acad Sci, Inst Astron, Sofia 1784, Bulgaria

[4] Bulgarian Acad Sci, Natl Astron Observ, Sofia 1784, Bulgaria

[5] INAF IASF Palermo, I-90146 Palermo, Italy

[6] Coll New Jersey, Dept Phys, Ewing, NJ 08628 USA

[7] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[8] Univ Sofia, Dept Astron, Sofia 1164, Bulgaria

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2011年 / 417卷 / 03期

基金：

美国国家科学基金会;

关键词：

radiation mechanisms: non-thermal; galaxies: active; BL Lacertae objects: general; OBJECT S5 0716+714; GAMMA-RAY FLARE; OPTICAL INTRADAY VARIABILITY; ACTIVE GALACTIC NUCLEI; LOG-PARABOLIC SPECTRA; LARGE-AREA TELESCOPE; LACERTAE OBJECTS; MULTIWAVELENGTH OBSERVATIONS; WEBT CAMPAIGN; EXTRAGALACTIC SOURCES;

D O I：

10.1111/j.1365-2966.2011.19373.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the results of our study of spectral energy distributions (SEDs) of a sample of 10 low- to intermediate-synchrotron-peaked blazars. We investigate some of the physical parameters most likely responsible for the observed short-term variations in blazars. To do so, we focus on the study of changes in the SEDs of blazars corresponding to changes in their respective optical fluxes. We model the observed spectra of blazars from radio to optical frequencies using a synchrotron model that entails a log-parabolic distribution of electron energies. A significant correlation among the two fitted spectral parameters (a, b) of log-parabolic curves and a negative trend among the peak frequency and spectral curvature parameter, b, emphasize that the SEDs of blazars are fitted well by log-parabolic curves. On considering each model parameter that could be responsible for changes in the observed SEDs of these blazars, we find that changes in the jet Doppler factors are most important.

引用

页码：1881 / 1890

页数：10

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