Sensitivity of the Cherenkov Telescope Array to TeV photon emission from the Large Magellanic Cloud
Sensitivity of the Cherenkov Telescope Array to TeV photon emission from the Large Magellanic Cloud
复制标题
切伦科夫望远镜阵列对大麦哲伦星云 TeV 光子发射的灵敏度
DOI：
10.1093/mnras/stad1576
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发表时间：
2023
影响因子：
4.8
通讯作者：
Angüner, E O
中科院分区：
文献类型：
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作者：
Acharyya, A;Adam, R;Aguasca-Cabot, A;Agudo, I;Aguirre-Santaella, A;Alfaro, J;Aloisio, R;Alves Batista, R;Amato, E;Angüner, E O
计划用切伦科夫望远镜阵列在~0.1- 100 TeV光子能量下对大麦哲伦云进行深度观测。我们评估的检测前景的基础上，银河系的排放模型，包括四个已知的TeV发射源，模拟人口的来源，和星际排放星系尺度。我们还评估了剑鱼座30和SN 1987 A的可探测性，以及可以推导出的暗物质性质的限制。该调查将允许对N157 B，N132 D，LMC P3和30 Doradus C进行精细的光谱研究，并应揭示其他六个来源，主要是脉冲星动力物体。如果SN 1987 A产生的宇宙射线核在高能时具有平坦的幂律谱，或者在2015-2035年期间通量增加3-4倍之前具有更陡的指数2.3-2.4，则可以检测到SN 1987 A的残余。如果大于10 GeV的光谱具有约2.7的软光子指数，那么大规模的星际辐射仍然是调查范围之外的，但是如果宇宙射线光谱硬化到大于100 GeV，则可以检测到0.1- 10 TeV的π介子衰变辐射。如果加速效率是机械光度的1-10%，并且扩散被抑制在<100秒差距的两个数量级，那么剑鱼座30恒星形成区是可以探测到的。最后，巡天可以探测尖形Navarro-Frenk-白色剖面中弱相互作用大质量粒子自湮灭的正则速度平均截面。
A deep survey of the Large Magellanic Cloud at ~0.1-100TeV photon energies with the Cherenkov Telescope Array is planned. We assess the detection prospects based on a model for the emission of the galaxy, comprising the four known TeV emitters, mock populations of sources, and interstellar emission on galactic scales. We also assess the detectability of 30 Doradus and SN 1987A, and the constraints that can be derived on the nature of dark matter. The survey will allow for fine spectral studies of N157B, N132D, LMC P3, and 30 Doradus C, and half a dozen other sources should be revealed, mainly pulsar-powered objects. The remnant from SN 1987A could be detected if it produces cosmic-ray nuclei with a flat power-law spectrum at high energies, or with a steeper index 2.3-2.4 pending a flux increase by a factor >3-4 over ~2015-2035. Large-scale interstellar emission remains mostly out of reach of the survey if its >10GeV spectrum has a soft photon index ~2.7, but degree-scale 0.1-10TeV pion-decay emission could be detected if the cosmic-ray spectrum hardens above >100GeV. The 30 Doradus star-forming region is detectable if acceleration efficiency is on the order of 1-10% of the mechanical luminosity and diffusion is suppressed by two orders of magnitude within <100pc. Finally, the survey could probe the canonical velocity-averaged cross section for self-annihilation of weakly interacting massive particles for cuspy Navarro-Frenk-White profiles.