Color variability of the blazar AO 0235+16

被引：5

作者：

Hagen-Thorn, V. A.

Larionov, V. M.

Raiteri, C. M.

Hagen-Thorn, E. I.

Shapiro, A. V.

Arkharov, A. A.

Takalo, L. O.

Sillanpaeae, A.

机构：

[1] St Petersburg State Univ, Sobolev Astron Inst, Petrodvorets 198904, Russia

[2] Osserv Astron Torino, INAF, I-10025 Pino Torinese, TO, Italy

[3] Russian Acad Sci, Main Pulkovo Astron Observ, St Petersburg 196140, Russia

[4] Univ Turku, Tuorla Observ, FI-21500 Turku, Finland

来源：

ASTRONOMY REPORTS | 2007年 / 51卷 / 11期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1134/S1063772907110029

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Multicolor (U BV RIJHK) observations of the blazar AO 0235+16 are analyzed. The light curves were compiled at the Turin Observatory from literature data and the results of observations obtained in the framework of the WEBT program (http://www.to.astro/blazars/webt/). The color variability of the blazar was studied in eight time intervals with a sufficient number of multicolor optical observations; JHK data are available for only one of these. The spectral energy distribution (SED) of the variable component remained constant within each interval, but varied strongly from one interval to another. After correction for dust absorption, the SED can be represented by a power law in all cases, providing evidence for a synchrotron nature of the variable component. We show that the variability at both optical and IR wavelengths is associated with the same variable source.

引用

页码：882 / 890

页数：9

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