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用切伦科夫望远镜阵列研究暗物质和基础物理

Dark Matter and Fundamental Physics with the Cherenkov Telescope Array

M. Doro, J. Conrad, D. Emmanoulopoulos, M. A. Sanchez-Conde, J. A. Barrio, E. Birsin, J. Bolmont, P. Brun, S. Colafrancesco, S. H. Connell, J. L. Contreras, M. … 展开作者

M. Doro, J. Conrad, D. Emmanoulopoulos, M. A. Sanchez-Conde, J. A. Barrio, E. Birsin, J. Bolmont, P. Brun, S. Colafrancesco, S. H. Connell, J. L. Contreras, M. K. Daniel, M. Fornasa, M. Gaug, J. F. Glicenstein, A. Gonzalez-Munoz, T. Hassan, D. Horns, A. Jacholkowska, C. Jahn, R. Mazini, N. Mirabal, A. Moralejo, E. Moulin, D. Nieto, J. Ripken, H. Sandaker, U. Schwanke, G. Spengler, A. Stamerra, A. Viana, H. S. Zechlin, S. Zimmer

摘要:

切伦科夫望远镜阵列(CTA)是下一代甚高能(GeV-TeV)地基伽马射线天文学观测台的一个项目,目前处于设计阶段,预计几年后将投入使用。几十个2-3个不同尺寸的望远镜,分布在一个大的区域,将允许比目前的仪器,如H.E.S.S,MAGIC和VERITAS,能量覆盖范围从几十个GeV到几十个TeV,以及高达10度的视场高出约10倍的灵敏度。在接下来的研究中,我们调查了CTA研究影响我们目前基础物理知识的几个科学问题的前景。基于保守的假设,不同的CTA望远镜配置的性能,我们采用基于蒙特卡罗的方法来评估检测的前景。首先,我们讨论CTA的前景冷暗物质搜索,以下不同的观测策略:在银河系的矮卫星星系,在该地区靠近银河系中心,并在星系团。空间签名的可能搜索,促进了CTA的更大的视野,也进行了讨论。接下来,我们考虑寻找类轴子粒子,除了可能是暗物质的候选者外,还可以解释河外背景光对来自非常遥远的耀变体的伽马射线的意外低吸收。模拟的光变曲线的耀斑源也被用来确定的灵敏度违反洛伦兹不变性的检测在不同能量的光子的到达时间之间的可能的延迟。最后,我们提到搜索其他奇异的物理与CTA。

英文摘要:

The Cherenkov Telescope Array (CTA) is a project for a next-generation observatory for very high energy (GeV-TeV) ground-based gamma-ray astronomy, currently in its design phase, and foreseen to be operative a few years from now. Several tens of telescopes of 2-3 different sizes, distributed over a large area, will allow for a sensitivity about a factor 10 better than current instruments such as H.E.S.S, MAGIC and VERITAS, an energy coverage from a few tens of GeV to several tens of TeV, and a field of view of up to 10 deg. In the following study, we investigate the prospects for CTA to study several science questions that influence our current knowledge of fundamental physics. Based on conservative assumptions for the performance of the different CTA telescope configurations, we employ a Monte Carlo based approach to evaluate the prospects for detection. First, we discuss CTA prospects for cold dark matter searches, following different observational strategies: in dwarf satellite galaxies of the Milky Way, in the region close to the Galactic Centre, and in clusters of galaxies. The possible search for spatial signatures, facilitated by the larger field of view of CTA, is also discussed. Next we consider searches for axion-like particles which, besides being possible candidates for dark matter may also explain the unexpectedly low absorption by extragalactic background light of gamma rays from very distant blazars. Simulated light-curves of flaring sources are also used to determine the sensitivity to violations of Lorentz Invariance by detection of the possible delay between the arrival times of photons at different energies. Finally, we mention searches for other exotic physics with CTA.

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