The continuum spectral features of blazars in the optical region
The continuum spectral features of blazars in the optical region
复制标题
DOI：
10.1051/0004-6361:20034218
复制
发表时间：
2004-05
影响因子：
6.5
通讯作者：
M. Fiorucci;S. Ciprini;G. Tosti
中科院分区：
文献类型：
--
作者：
M. Fiorucci;S. Ciprini;G. Tosti
在过去的十年里，佩鲁贾大学天文台对37颗耀变体进行了多次准同步光学观测。在本文中，我们分析了在光学频率范围内的去红光谱通量分布，我们比较我们的结果与整体光谱能量分布（SED）。对现有模型的对象的影响进行了简要讨论。特别地，我们展示了LBL如何具有光谱斜率α 1.5，正如同步加速器自康普顿模型所预期的那样，而HBL和FSRQ的光学发射可能被其他成分污染。此外，我们展示了光谱指数与通量图如何表现出一个特征性的环状图案的证据，这可能是由于加速粒子注入的变化。
Many quasi-simultaneous optical observations of 37 blazars were obtained at the Perugia University Observatory over the last ten years. In this paper we analyze the dereddened spectral flux distribution in the optical frequency range, and we compare our results with the overall spectral energy distribution (SED). The implications for existing models of the objects are briefly discussed. In particular, we show how the LBLs have a spectral slope α � 1.5, as expected from Synchrotron Self- Compton models, while the optical emission of HBLs and FSRQs is probably contaminated by other components. Moreover, we show evidence of how the spectral index vs. flux plot exhibits a characteristic loop-like pattern that is probably due to changes in the injection of accelerated particles.