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arXiv 1301.3014astro-ph.HEastro-ph.CO
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切伦科夫望远镜阵列时代的伽马射线暴科学

Gamma-Ray Burst Science in the Era of the Cherenkov Telescope Array

Susumu Inoue, Jonathan Granot, Paul T. O'Brien, Katsuaki Asano, Aurelien Bouvier, Alessandro Carosi, Valerie Connaughton, Markus Garczarczyk, Rudy Gilmore, Jim … 展开作者

Susumu Inoue, Jonathan Granot, Paul T. O'Brien, Katsuaki Asano, Aurelien Bouvier, Alessandro Carosi, Valerie Connaughton, Markus Garczarczyk, Rudy Gilmore, Jim Hinton, Yoshiyuki Inoue, Kunihito Ioka, Jun Kakuwa, Sera Markoff, Kohta Murase, Julian P. Osborne, A. Nepomuk Otte, Rhaana Starling, Hiroyasu Tajima, Masahiro Teshima, Kenji Toma, Stefan Wagner, Ralph A. M. J. Wijers, David A. Williams, Tokonatsu Yamamoto, Ryo Yamazaki

摘要:

我们概述了伽马射线暴(GRB)的科学前景与切伦科夫望远镜阵列(CTA),下一代地基伽玛射线天文台运行在几十GeV以上的能量。由于其低能量阈值,大有效面积和快速回转能力,CTA将能够以前所未有的光子统计测量多GeV能量的GRB的光谱和变化,从而在阐明GRB物理学方面开辟新天地,这仍然是知之甚少。这些测量还将提供对伽玛暴中超高能宇宙射线和中微子产生的重要诊断,通过探测高红移的河外背景光和星系间磁场推进观测宇宙学,并通过高精度测试洛伦兹不变性破坏为基础物理学做出贡献。为了量化这些目标,我们提出了一些模拟观测的伽玛射线暴光谱和光变曲线,连同估计其探测率与CTA。虽然预期的探测率是适度的,每年几个伽玛暴的数量级,但一旦被探测到,每次爆发可能会达到数百个或更多的高能光子。我们还讨论了与CTA的卫星和其他设施的后续警报有关的各种问题,以及其他波长的后续观测。本文还简要讨论了在宽场观测模式下发现和观测伽玛暴的可能性。

英文摘要:

We outline the science prospects for gamma-ray bursts (GRBs) with the Cherenkov Telescope Array (CTA), the next-generation ground-based gamma-ray observatory operating at energies above few tens of GeV. With its low energy threshold, large effective area and rapid slewing capabilities, CTA will be able to measure the spectra and variability of GRBs at multi-GeV energies with unprecedented photon statistics, and thereby break new ground in elucidating the physics of GRBs, which is still poorly understood. Such measurements will also provide crucial diagnostics of ultra-high-energy cosmic ray and neutrino production in GRBs, advance observational cosmology by probing the high-redshift extragalactic background light and intergalactic magnetic fields, and contribute to fundamental physics by testing Lorentz invariance violation with high precision. Aiming to quantify these goals, we present some simulated observations of GRB spectra and light curves, together with estimates of their detection rates with CTA. Although the expected detection rate is modest, of order a few GRBs per year, hundreds or more high-energy photons per burst may be attainable once they are detected. We also address various issues related to following up alerts from satellites and other facilities with CTA, as well as follow-up observations at other wavelengths. The possibility of discovering and observing GRBs from their onset including short GRBs during a wide-field survey mode is also briefly discussed.

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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