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Simulation on gamma ray astronomy research with LHAASO-KM2A

机译:用LHAASO-KM2A模拟伽马射线天文学

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LHAASO (Large High Altitude Air Shower Observatory) is a large project to research on high energy gamma ray astronomy and cosmic ray physics. KM2A (one KM2 Array), one main part of the LHAASO project, using a 1 km2 array composed of electron detectors (ED) and muon detectors (MD), focuses on gamma ray astronomy above 30 TeV and cosmic ray physics in the "knee" region. Accurate measurement of gamma ray energy spectra above 30 TeV is crucial to identify the sources as the galactic cosmic ray accelerators. Monte Carlo simulation indicates that cosmic gamma rays can be distinguished from cosmic nuclei background by using muon content in extensive air showers (EAS). With the sensitivity of about 1% of the integral flux of Crab Nebula, the high duty cycle of at least 90% and the full sky survey, the KM2A array would be very useful in discovering the galactic gamma ray sources and identifying the cosmic ray sources with gamma-ray emission. A detailed simulation is carried out for studying performance and expectation of the KM2A array in gamma ray astronomy above 30 TeV.
机译:LHAASO(大型高空空气淋浴天文台)是一个大型项目,旨在研究高能伽马射线天文学和宇宙射线物理学。 KM2A(一个KM2阵列)是LHAASO项目的主要部分,使用由电子探测器(ED)和μ子探测器(MD)组成的1 km2阵列,着重于30 TeV以上的伽马射线天文学和“膝盖”中的宇宙射线物理学。 ”区域。准确测量高于30 TeV的伽马射线能谱对于将源识别为银河系宇宙射线加速器至关重要。蒙特卡洛模拟表明,通过在大范围的空气淋浴(EAS)中使用介子含量,可以将宇宙伽马射线与宇宙核背景区分开。 KM2A阵列的灵敏度约为蟹状星云积分通量的1%,具有至少90%的高占空比,并且可以进行全天候测量,因此在发现银河伽玛射线源和识别宇宙射线源方面将非常有用带有伽马射线发射。为了研究KM2A阵列在30 TeV以上的伽马射线天文学中的性能和预期,进行了详细的仿真。

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