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Cosmic ray tracers from gas-rich active galaxies

来自富含气体的活跃星系的宇宙射线示踪剂

基本信息

批准号：
193250435
负责人：
Professorin Dr. Julia Tjus
金额：
--
依托单位：
Lehrstuhl für Theoretische Plasma-Astroteilchenphysik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2011
资助国家：
德国
起止时间：
2010-12-31 至 2014-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/193250435?language=en
关键词：
Cosmic ray tracers gas rich

项目摘要

The identification of the origin of cosmic rays (CRs) is one of the most challenging and most interesting questions in the field of astrophysics today. Neutral cosmic ray secondaries produced at the CR production site are well-suited for studies of the origin of cosmic rays, in particular when different wavelengths are combined to search for correlated signals. Here, it is proposed to predict high- and low-energy signatures from cosmic ray interactions in gas-rich active galaxies. Active galaxies are one of the few candidates that fulfill the mandatory criteria for the acceleration of cosmic rays up to the highest energies, i.e. up to E ~ 1021 eV. For active galaxies containing much gas, high-energy cosmic rays are bound to interact with the gas, which leads to the production of high-energy neutrinos and photons, detectable by the telescopes IceCube and H.E.S.S./MAGIC/VERITAS. At the low-energy end of the cosmic ray spectrum, the charged particles ionize the gas, which leads to the formation of molecular ions. The latter emit vibration-rotation lines can be observed at infrared and mm wavelengths. New telescopes like Herschel at infrared wavelengths and ALMA at mm wavelengths will be very well suited for investigations. In this proposal, it is planned to calculate both high-energy (E > 100 GeV) and low-energy (E < 100 MeV) signatures, aiming for a correlation study which can help identifying the sources of cosmic rays.

宇宙线起源的确定是当今天体物理学领域最具挑战性和最有趣的问题之一。在CR生产场地产生的中性宇宙射线次级辐射非常适合于研究宇宙射线的起源，特别是当不同波长被组合以搜索相关信号时。在这里，它建议预测高和低能量的签名，从宇宙射线的相互作用，在富含气体的活动星系。活动星系是少数几个符合加速宇宙射线到最高能量（即E ~ 1021 eV）的强制性标准的候选者之一。对于含有大量气体的活动星系，高能宇宙射线必然会与气体相互作用，从而导致产生高能中微子和光子，可被IceCube和H.E.S.S.探测到。MAGIC/VERITAS。在宇宙射线光谱的低能量端，带电粒子与气体发生碰撞，导致分子离子的形成。后者发射的振动旋转线可以在红外和毫米波长观察到。新的望远镜，如赫歇尔在红外波长和阿尔马在毫米波长将非常适合调查。在这项提议中，计划计算高能（E > 100 GeV）和低能（E < 100 MeV）的特征，旨在进行相关研究，以帮助确定宇宙射线的来源。