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arXiv 0904.2087astro-ph.HEastro-ph.COhep-ph
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超高能光子探测附近的瞬态超高能Cosmic-Ray源和可能的洛伦兹不变性破坏

Ultrahigh-Energy Photons as a Probe of Nearby Transient Ultrahigh-Energy Cosmic-Ray Sources and Possible Lorentz-Invariance Violation

Kohta Murase

摘要:

探测中微子和光子对于确定超高能宇宙射线(UHECR)的来源至关重要,特别是对于瞬态源。我们专注于超高能伽玛射线发射的瞬态源,如伽马射线暴,因为>EeV的伽玛射线可以更直接的证据UHECR比PeV中微子和GeV-TeV的伽玛射线。我们表明,目前和未来的UHECR探测器,如俄歇和JEM-EUSO,可以预期约1-100事件的符合检测,检测概率可以高于中微子附近的瞬态源在<50-100 Mpc。这些结果对于约束不确定的宇宙射电背景以及了解UHECR的源性质和最大能量都是有用的。它们还可以给我们比电流约束强10^4倍的洛伦兹不变性破坏极限。

英文摘要:

Detecting neutrinos and photons is crucial to identifying the sources of ultrahigh-energy cosmic rays (UHECRs), especially for transient sources. We focus on ultrahigh-energy gamma-ray emission from transient sources such as gamma-ray bursts, since >EeV gamma rays can be more direct evidence of UHECRs than PeV neutrinos and GeV-TeV gamma rays. We demonstrate that coincident detections of about 1-100 events can be expected by current and future UHECR detectors such as Auger and JEM-EUSO, and the detection probability can be higher than that of neutrinos for nearby transient sources at <50-100 Mpc. They may be useful for constraining the uncertain cosmic radio background as well as knowing the source properties and maximum energy of UHECRs. They can also give us more than 10^4 times stronger limits on the Lorentz-invariance violation than current constraints.

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