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arXiv 1206.6147astro-ph.HE
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3C 279在内冲击情景下的多波长光谱研究

Multiwavelength Spectral Study of 3C 279 in the Internal Shock Scenario

Manasvita Joshi, Svetlana Jorstad, Alan Marscher, Markus Böttcher, Ivan Agudo, Valeri Larionov, Margo Aller, Mark Gurwell, Anne Lähteenmäki

摘要:

我们在2008年11月观测到3C~279处于γ射线耀斑状态。我们构建了2008年耀斑期间和2010年5月平静期间的源的准同步光谱能量分布(SED)。数据是由费米、斯威夫特、RXTE、VLBA和各种地面光学和射电望远镜的观测汇编而成的。目的是通过对3C~279在内激波情景下的光谱分析,了解这两个时间段观测到的通量和偏振变化之间的对应关系,并深入了解内禀参数的作用以及同步辐射和逆康普顿辐射过程的相互作用。作为第一步,我们使用了一个多切片含时轻子喷流模型,在内激波框架下,考虑辐射反馈,模拟了2006年初在光学高态下观测到的3C~279的SED。我们已经使用物理射流参数从VLBA监测,以指导我们的建模工作。我们简要地讨论了在生产所得的SED的内参数和各种辐射过程的影响。

英文摘要:

We have observed 3C~279 in a gamma-ray flaring state in November 2008. We construct quasi-simultaneous spectral energy distributions (SEDs) of the source for the flaring period of 2008 and during a quiescent period in May 2010. Data have been compiled from observations with Fermi, Swift, RXTE, the VLBA, and various ground-based optical and radio telescopes. The objective is to comprehend the correspondence between the flux and polarization variations observed during these two time periods by carrying out a detailed spectral analyses of 3C~279 in the internal shock scenario, and gain insights into the role of intrinsic parameters and interplay of synchrotron and inverse Compton radiation processes responsible for the two states. As a first step, we have used a multi-slice time-dependent leptonic jet model, in the framework of the internal shock scenario, with radiation feedback to simulate the SED of 3C~279 observed in an optical high state in early 2006. We have used physical jet parameters obtained from the VLBA monitoring to guide our modeling efforts. We briefly discuss the effects of intrinsic parameters and various radiation processes in producing the resultant SED.

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