What Can We Learn about Cosmic Ray Acceleration in Westerlund 2 from SRG/ART-XC Data?

被引：0

作者：

Kalyashova, M.E. ^{[1
]}

Bykov, A.M. ^{[1
]}

Uvarov, Yu. A. ^{[1
]}

Badmaev, D.V. ^{[1
]}

Lapshov, I. Yu. ^{[2
]}

Lutovinov, A.A. ^{[2
]}

机构：

[1] Ioffe Institute, Russian Academy of Sciences, St. Petersburg

[2] Space Research Institute, Russian Academy of Sciences, Moscow

来源：

Bulletin of the Russian Academy of Sciences: Physics | 2025年 / 89卷 / 06期

关键词：

high-energy cosmic rays; young massive star clusters;

D O I：

10.1134/S1062873825711559

中图分类号：

学科分类号：

摘要：

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. © Pleiades Publishing, Ltd. 2025.

引用

页码：998 / 1001

页数：3

共 17 条

[1]

Aharonian F., Yang R., de Ona Wilhelmi E., Nat. Astron, 3, (2019)

[2]

Bykov A.M., Marcowith A., Amato E., Kalyashova M.E., Kruijssen J.M.D., Waxman E., Space Sci. Rev, 216, (2020)

[3]

Kalyashova M.E., Bykov A.M., Osipov S.M., Bull. Russ. Acad. Sci.: Phys, 85, (2021)

[4]

Kalyashova M.E., Bykov A.M., Osipov S.M., Bull. Russ. Acad. Sci.: Phys, 87, (2023)

[5]

Bykov A.M., Astron. Astrophys. Rev, 22, (2014)

[6]

Zirakashvili V.N., Ptuskin V.S., Bull. Russ. Acad. Sci.: Phys, 85, (2021)

[7]

As A., Astron. Astrophys, 525, (2011)

[8]

Ackermann M., Ajello M., Baldini L., Ballet J., Astrophys. J, 843, (2017)

[9]

Mestre E., de Ona Wilhelmi E., Torres D.F., Mon. Not. R. Astron. Soc, 505, (2021)

[10]

Muno M.P., Law C., Clark J.S., Astrophys. J, 650, (2006)

← 1 2 →