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arXiv 1903.05660astro-ph.HE
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宇宙射线和星际介质的MeV能Gamma-Ray观测

Cosmic Rays and Interstellar Medium with Gamma-Ray Observations at MeV Energies

Elena Orlando, Isabelle Grenier, Vincent Tatischeff, Andrei Bykov, Regina Caputo, Alessandro De Angelis, Jurgen Kiener, Alexandre Marcowith, Julie McEnery, Andr… 展开作者

Elena Orlando, Isabelle Grenier, Vincent Tatischeff, Andrei Bykov, Regina Caputo, Alessandro De Angelis, Jurgen Kiener, Alexandre Marcowith, Julie McEnery, Andrew Strong, Luigi Tibaldo, Zorawar Wadiasingh, Andreas Zoglauer

摘要:

最新的精确宇宙射线(CR)测量和目前的伽马射线观测已经开始挑战我们的理解CR运输和相互作用在银河系。此外,由于CR的密度与星际介质(ISM)中的磁场、气体和星光的密度相似,因此CR预计会影响ISM的动力学,包括决定运输和恒星形成的物理和化学过程。在这种背景下,观测低能回旋共振产生的MeV γ射线辐射是非常重要和紧迫的。一个覆盖能量范围在~0.1 MeV和几GeV之间的望远镜,其灵敏度比以前的仪器高出一个数量级以上,将首次允许详细研究低能CR,提供有关其来源、整个银河系的光谱、丰度、传输特性及其在银河系演化和恒星形成中的作用的信息。在这里,我们讨论的CR,ISM(气体,星际光子,和磁场)和相关的伽马射线发射与这样的仪器的研究的科学前景。

英文摘要:

Latest precise cosmic-ray (CR) measurements and present gamma-ray observations have started challenging our understanding of CR transport and interaction in the Galaxy. Moreover, because the density of CRs is similar to the density of the magnetic field, gas, and starlight in the interstellar medium (ISM), CRs are expected to affect the ISM dynamics, including the physical and chemical processes that determine transport and star formation. In this context, observations of gamma-ray emission at MeV energies produced by the low-energy CRs are very important and urgent. A telescope covering the energy range between ~0.1 MeV and a few GeV with a sensitivity more than an order of magnitude better than previous instruments would allow for the first time to study in detail the low-energy CRs, providing information on their sources, their spectra throughout the Galaxy, their abundances, transport properties, and their role on the evolution of the Galaxy and star formation. Here we discuss the scientific prospects for studies of CRs, ISM (gas, interstellar photons, and magnetic fields) and associated gamma-ray emissions with such an instrument.

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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