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首页> 外文期刊>The Astrophysical journal >Constraints On Energy Spectra Of Blazars Based On Recent Ebl Limits From Galaxy Counts
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Constraints On Energy Spectra Of Blazars Based On Recent Ebl Limits From Galaxy Counts

机译：基于银河计数的最近Ebl限制对酒渣能量谱的约束

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摘要

We combine the recent estimate of the contribution of galaxies to the 3.6 μm intensity of the extragalactic background light (EBL) with optical and near-infrared (IR) galaxy counts to set new limits on intrinsic spectra of some of the most distant TeV blazars, 1ES 0229+200, 1ES 1218 + 30.4, and 1ES 1101-232, located at redshifts 0.1396, 0.182, and 0.186, respectively. The new lower limit on the 3.6 μm EBL intensity is significantly higher than the previous one set by the cumulative emission from resolved Spitzer galaxies. Correcting for attenuation by the revised EBL, we show that the differential spectral index of the intrinsic spectrum of the three blazars is 1.28 ± 0.20 or harder. These results present blazar emission models with the challenge of producing extremely hard intrinsic spectra in the sub-TeV to multi-TeV regime. These results also question the reliability of recently derived upper limits on the near-IR EBL intensity that are solely based on the assumption that intrinsic blazar spectra should not be harder than 1.50.
机译：我们将最近对星系对3.6μm强度的银河外背景光（EBL）的贡献的估计与光学和近红外（IR）星系计数相结合，为一些最遥远的TeV blazar的固有光谱设定了新的限制， 1ES 0229 + 200、1ES 1218 + 30.4和1ES 1101-232，分别位于红移0.1396、0.182和0.186处。 3.6微米EBL强度的新下限比解析的Spitzer星系的累积发射显着高于上一个上限。通过修订后的EBL校正衰减，我们发现三种blazar的本征光谱的差分光谱指数为1.28±0.20或更硬。这些结果为blazar排放模型提出了挑战，即在次TeV到多TeV体制中产生极硬的固有光谱。这些结果还对近红外EBL强度最近得出的上限的可靠性提出了质疑，这些上限完全基于以下假设：固有的易碎性谱图不应该大于1.50。

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