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arXiv 1202.2236astro-ph.COastro-ph.HE
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高功率-高同步辐射峰值耀变体的发现

The discovery of high power - high synchrotron peak blazars

P. Padovani, P. Giommi, A. Rau

摘要:

我们研究了11个伽玛射线选择耀变体的近红外、光学、紫外和X射线测光的准同时测量,这些耀变体的红移估计最近已经被提供大于1.2。其中四个天体被证明是高功率耀变体,其同步辐射峰值在~ 3 x 10^15和~ 10^16 Hz之间,因此是一种预测存在但从未见过的类型。这一发现对于我们理解blazar中的物理过程具有重要意义,包括所谓的“blazar序列”,并且也可能有助于通过伽马射线吸收来限制河外背景光,因为即使在10 - 100 GeV的费米LAT波段也强烈检测到两个源。根据我们以前的工作和它们的高功率,这些源很可能是高红移平谱射电类星体,它们的发射线被非热连续谱淹没。

英文摘要:

We study the quasi-simultaneous near-IR, optical, UV, and X-ray photometry of eleven gamma-ray selected blazars for which redshift estimates larger than 1.2 have been recently provided. Four of these objects turn out to be high-power blazars with the peak of their synchrotron emission between ~ 3 x 10^15 and ~ 10^16 Hz, and therefore of a kind predicted to exist but never seen before. This discovery has important implications for our understanding of physical processes in blazars, including the so-called "blazar sequence", and might also help constraining the extragalactic background light through gamma-ray absorption since two sources are strongly detected even in the 10 - 100 GeV Fermi-LAT band. Based on our previous work and their high powers, these sources are very likely high-redshift flat-spectrum radio quasars with their emission lines swamped by the non-thermal continuum.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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