M. E. Kalyashova, A. M. Bykov, Yu. A. Uvarov, D. V. Badmaev, I. Yu. Lapshov, A. A. Lutovinov
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引用次数: 0
Abstract
Compact clusters of young massive stars are considered as perspective sources of galactic cosmic rays. Recent detection of the well-known cluster Westerlund 2 (Wd2) with Mikhail Pavlinsky ART-XC telescope aboard the Spectrum Roentgen-Gamma orbital observatory revealed the presence of X-ray emission above 10 keV. The joint analysis of Chandra and ART-XC observations together with 3D-MHD modeling of the cluster pointed to the nonthermal origin of hard X-ray emission. We argue here that the nonthermal component can be produced by synchrotron radiation of multi-TeV electrons accelerated in Wd2 by multiple colliding stellar winds. Our model allows explaining the X-ray observations and is consistent with the observed gamma-ray emission of the source.
期刊介绍：
Bulletin of the Russian Academy of Sciences: Physics is an international peer reviewed journal published with the participation of the Russian Academy of Sciences. It presents full-text articles (regular, letters to the editor, reviews) with the most recent results in miscellaneous fields of physics and astronomy: nuclear physics, cosmic rays, condensed matter physics, plasma physics, optics and photonics, nanotechnologies, solar and astrophysics, physical applications in material sciences, life sciences, etc. Bulletin of the Russian Academy of Sciences: Physics focuses on the most relevant multidisciplinary topics in natural sciences, both fundamental and applied. Manuscripts can be submitted in Russian and English languages and are subject to peer review. Accepted articles are usually combined in thematic issues on certain topics according to the journal editorial policy. Authors featured in the journal represent renowned scientific laboratories and institutes from different countries, including large international collaborations. There are globally recognized researchers among the authors: Nobel laureates and recipients of other awards, and members of national academies of sciences and international scientific societies.
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