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首页> 外文期刊>Space Science Reviews >ABSORPTION OF HIGH ENERGY GAMMA-RAYS BY LOW ENERGY INTERGALACTIC PHOTONS
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ABSORPTION OF HIGH ENERGY GAMMA-RAYS BY LOW ENERGY INTERGALACTIC PHOTONS

机译：低能星际光子对高能伽玛射线的吸收

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Following our previously proposed technique, we have used the recent gamma-ray observations of Mkr421 to place theoretically significant constraints on the magnitude of the intergalactic infrared radiation field (IIRF). Our 2 sigma upper limits are consistent with normal IR production by stars and dust in galaxies. They rule out exotic mechanisms proposed to produce a larger IIRF. Although they are still subject to revision and are unconfirmed, the data on the spectrum of Mkr421 hint at a possible absorption cutoff which could be produced by an IIRF of the magnitude expected from stellar emission and reprocessing in galaxies. Using models for the low energy intergalactic photon spectrum from microwave to ultraviolet energies, we calculate the opacity of intergalactic space to gamma-rays as a function of energy and redshift. These calculations indicate that the GeV gamma-ray burst recently observed by the CGRO EGRET detector originates at a redshift less than similar to 1.5. [References: 50]
机译：遵循我们先前提出的技术，我们已使用Mkr421的最新伽马射线观测值对星际红外辐射场（IIRF）的大小施加了理论上显着的约束。我们的2 sigma上限与星系中恒星和尘埃产生的正常IR一致。他们排除了提出产生更大IIRF的外来机制。尽管它们仍在修订中，并且未经证实，但Mkr421光谱数据暗示可能存在吸收截止，这可能是由星系发射和后处理中预期的IIRF产生的IIRF产生的。使用从微波到紫外线能量的低能星际光子光谱模型，我们计算了星际空间对伽马射线的不透明度是能量和红移的函数。这些计算表明，CGRO EGRET检测器最近观测到的GeV伽马射线爆发起源于红移，小于约1.5。 [参考：50]

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