MODELING PHOTODISINTEGRATION-INDUCED TeV PHOTON EMISSION FROM LOW-LUMINOSITY GAMMA-RAY BURSTS
MODELING PHOTODISINTEGRATION-INDUCED TeV PHOTON EMISSION FROM LOW-LUMINOSITY GAMMA-RAY BURSTS
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DOI：
10.1088/0004-6256/143/5/115
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发表时间：
2012-05
期刊：
影响因子：
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通讯作者：
Xueting Liu;Xuefeng Wu;T. Lu
中科院分区：
文献类型：
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作者：
Xueting Liu;Xuefeng Wu;T. Lu
超高能宇宙射线重核最近被认为是起源于附近的低光度伽玛射线爆发，与Ibc型超新星有关。与长持续时间伽马射线暴的幂律衰减不同，这些暴的光变曲线表现出复杂的紫外/光学行为：冲击爆发在大约1天左右占主导地位的热辐射峰值，并且在此之后，放射性物质持续数十天几乎恒定的发射。我们表明，在PeV能量的高度提升的重核与UV/光学光子场相互作用将产生相当大的TeV光子通过光衰变/光去激发过程。后来预测类热γ射线谱的峰值约为几TeV，这可能是核加速的证据。费米太空望远镜和地面大气切伦科夫望远镜（如H.E.S.S.）的未来观测，VERITAS和MAGIC将揭示这一预测。
Ultra-high-energy cosmic-ray heavy nuclei have recently been considered as originating from nearby low-luminosity gamma-ray bursts that are associated with Type Ibc supernovae. Unlike the power-law decay in long duration gamma-ray bursts, the light curve of these bursts exhibits complex UV/optical behavior: shock breakout dominated thermal radiation peaks at about 1 day, and, after that, nearly constant emission sustained by radioactive materials for tens of days. We show that the highly boosted heavy nuclei at PeV energy interacting with the UV/optical photon field will produce considerable TeV photons via the photodisintegration/photo-de-excitation process. It was later predicted that a thermal-like γ-ray spectrum peaks at about a few TeV, which may serve as evidence of nucleus acceleration. The future observations by the space telescope Fermi and by the ground atmospheric Cherenkov telescopes such as H.E.S.S., VERITAS, and MAGIC will shed light on this prediction.