Related papers: Gamma-ray emission from Cassiopeia A produced by a…

Cosmic Ray Acceleration by Supernova Shocks

We analyse the results of recent measurements of nonthermal emission from individual supernova remnants (SNRs) and their correspondence to the nonlinear kinetic theory of cosmic ray (CR) acceleration in SNRs. It is shown that the theory…

Astrophysics · Physics 2008-11-26 E. G. Berezhko

Measuring the asymmetric expansion of the Fe ejecta of Cassiopeia A with XRISM/Resolve

The expansion structure of supernova remnants (SNRs) is important for understanding not only how heavy elements are distributed into space, but also how supernovae explode. The ejecta expansion structure of the young core-collapse SNR Cas A…

High Energy Astrophysical Phenomena · Physics 2025-04-10 Aya Bamba , Manan Agarwal , Jacco Vink , Paul Plucinsky , Yukikatsu Terada , Ehud Behar , Satoru Katsuda , Koji Mori , Makoto Sawada , Hironori Matsumoto , Lia Corrales , Adam Foster , Shin-ichiro Fujimoto , Liyi Gu , Kazuhiro Ichikawa , Kai Matsunaga , Tsunefumi Mizuno , Hiroshi Murakami , Hiroshi Nakajima , Toshiki Sato , Haruto Sonoda , Shunsuke Suzuki , Dai Tateishi , Hiroyuki Uchida , Masahiro Ichihashi , Kumiko Nobukawa , Salvatore Orlando

Anisotropic CR diffusion and gamma-ray production close to supernova remnants, with an application to W28

Cosmic rays that escape their acceleration site interact with the ambient medium and produce gamma rays as the result of inelastic proton-proton collisions. The detection of such diffuse emission may reveal the presence of an accelerator of…

High Energy Astrophysical Phenomena · Physics 2015-06-12 Lara Nava , Stefano Gabici

Long-term evolution of non-thermal emission from Type Ia and core-collapse supernova remnants in a diversified circumstellar medium

The contribution of galactic supernova remnants (SNRs) to the origin of cosmic rays (CRs) is an important open question in modern astrophysics. Broadband non-thermal emission is a useful proxy for probing the energy budget and production…

High Energy Astrophysical Phenomena · Physics 2022-09-07 Ryosuke Kobashi , Haruo Yasuda , Shiu-Hang Lee

The X-ray Expansion of the Supernova Remnant Cassiopeia A

We present the first X-ray expansion measurement of the SNR Cas A. We compared new ROSAT to archived Einstein HRI images with a separation of 17 years. The remnant is seen to be expanding, on average, at a rate of 0.20 %/yr, which is twice…

Astrophysics · Physics 2009-10-30 Barron Koralesky , L. Rudnick , E. V. Gotthelf , J. W. Keohane

X-ray spectral imaging and Doppler mapping of Cassiopeia A

A detailed X-ray spectral analysis of Cas A using a deep exposure from the EPIC-MOS cameras on-board XMM-Newton is presented. Spectral fitting was performed on a 15x15 grid of 20"x20" pixels using a two component non-equilibrium ionisation…

Astrophysics · Physics 2009-11-06 R. Willingale , J. A. M. Bleeker , K. J. van der Heyden , J. S. Kaastra , J. Vink

Does or did the supernova remnant Cassiopeia A operate as a PeVatron?

For decades, supernova remnants (SNRs) have been considered the prime sources of Galactic Cosmic rays (CRs). But whether SNRs can accelerate CR protons to PeV energies and thus dominate CR flux up to the knee is currently under intensive…

High Energy Astrophysical Phenomena · Physics 2023-10-27 Zhen Cao , F. Aharonian , Q. An , Axikegu , Y. X. Bai , Y. W. Bao , D. Bastieri , X. J. Bi , Y. J. Bi , J. T. Cai , Q. Cao , W. Y. Cao , Zhe Cao , J. Chang , J. F. Chang , A. M. Chen , E. S. Chen , Liang Chen , Lin Chen , Long Chen , M. J. Chen , M. L. Chen , Q. H. Chen , S. H. Chen , S. Z. Chen , T. L. Chen , Y. Chen , N. Cheng , Y. D. Cheng , M. Y. Cui , S. W. Cui , X. H. Cui , Y. D. Cui , B. Z. Dai , H. L. Dai , Z. G. Dai , Danzengluobu , D. della Volpe , X. Q. Dong , K. K. Duan , J. H. Fan , Y. Z. Fan , J. Fang , K. Fang , C. F. Feng , L. Feng , S. H. Feng , X. T. Feng , Y. L. Feng , S. Gabici , B. Gao , C. D. Gao , L. Q. Gao , Q. Gao , W. Gao , W. K. Gao , M. M. Ge , L. S. Geng , G. Giacinti , G. H. Gong , Q. B. Gou , M. H. Gu , F. L. Guo , X. L. Guo , Y. Q. Guo , Y. Y. Guo , Y. A. Han , H. H. He , H. N. He , J. Y. He , X. B. He , Y. He , M. Heller , Y. K. Hor , B. W. Hou , C. Hou , X. Hou , H. B. Hu , Q. Hu , S. C. Hu , D. H. Huang , T. Q. Huang , W. J. Huang , X. T. Huang , X. Y. Huang , Y. Huang , Z. C. Huang , X. L. Ji , H. Y. Jia , K. Jia , K. Jiang , X. W. Jiang , Z. J. Jiang , M. Jin , M. M. Kang , T. Ke , D. Kuleshov , K. Kurinov , B. B. Li , Cheng Li , Cong Li , D. Li , F. Li , H. B. Li , H. C. Li , H. Y. Li , J. Li , Jian Li , Jie Li , K. Li , W. L. Li , W. L. Li , X. R. Li , Xin Li , Y. Z. Li , Zhe Li , Zhuo Li , E. W. Liang , Y. F. Liang , S. J. Lin , B. Liu , C. Liu , D. Liu , H. Liu , H. D. Liu , J. Liu , J. L. Liu , J. Y. Liu , M. Y. Liu , R. Y. Liu , S. M. Liu , W. Liu , Y. Liu , Y. N. Liu , R. Lu , Q. Luo , H. K. Lv , B. Q. Ma , L. L. Ma , X. H. Ma , J. R. Mao , Z. Min , W. Mitthumsiri , H. J. Mu , Y. C. Nan , A. Neronov , Z. W. Ou , B. Y. Pang , P. Pattarakijwanich , Z. Y. Pei , M. Y. Qi , Y. Q. Qi , B. Q. Qiao , J. J. Qin , D. Ruffolo , A. Sáiz , D. Semikoz , C. Y. Shao , L. Shao , O. Shchegolev , X. D. Sheng , F. W. Shu , H. C. Song , Yu. V. Stenkin , V. Stepanov , Y. Su , Q. N. Sun , X. N. Sun , Z. B. Sun , P. H. T. Tam , Q. W. Tang , Z. B. Tang , W. W. Tian , C. Wang , C. B. Wang , G. W. Wang , H. G. Wang , H. H. Wang , J. C. Wang , K. Wang , L. P. Wang , L. Y. Wang , P. H. Wang , R. Wang , W. Wang , X. G. Wang , X. Y. Wang , Y. Wang , Y. D. Wang , Y. J. Wang , Z. H. Wang , Z. X. Wang , Zhen Wang , Zheng Wang , D. M. Wei , J. J. Wei , Y. J. Wei , T. Wen , C. Y. Wu , H. R. Wu , S. Wu , X. F. Wu , Y. S. Wu , S. Q. Xi , J. Xia , J. J. Xia , G. M. Xiang , D. X. Xiao , G. Xiao , G. G. Xin , Y. L. Xin , Y. Xing , Z. Xiong , D. L. Xu , R. F. Xu , R. X. Xu , W. L. Xu , L. Xue , D. H. Yan , J. Z. Yan , T. Yan , C. W. Yang , F. Yang , F. F. Yang , H. W. Yang , J. Y. Yang , L. L. Yang , M. J. Yang , R. Z. Yang , S. B. Yang , Y. H. Yao , Z. G. Yao , Y. M. Ye , L. Q. Yin , N. Yin , X. H. You , Z. Y. You , Y. H. Yu , Q. Yuan , H. Yue , H. D. Zeng , T. X. Zeng , W. Zeng , M. Zha , B. B. Zhang , F. Zhang , H. M. Zhang , H. Y. Zhang , J. L. Zhang , L. X. Zhang , Li Zhang , P. F. Zhang , P. P. Zhang , R. Zhang , S. B. Zhang , S. R. Zhang , S. S. Zhang , X. Zhang , X. P. Zhang , Y. F. Zhang , Yi Zhang , Yong Zhang , B. Zhao , J. Zhao , L. Zhao , L. Z. Zhao , S. P. Zhao , F. Zheng , B. Zhou , H. Zhou , J. N. Zhou , M. Zhou , P. Zhou , R. Zhou , X. X. Zhou , C. G. Zhu , F. R. Zhu , H. Zhu , K. J. Zhu , X. Zuo.

Evolution and observational signatures of the cosmic ray electron spectrum in SN 1006

Supernova remnants (SNRs) are believed to be the source of Galactic cosmic rays (CRs). SNR shocks accelerate CR protons and electrons which reveal key insights into the non-thermal physics by means of their synchrotron and $\gamma$-ray…

High Energy Astrophysical Phenomena · Physics 2020-12-08 Georg Winner , Christoph Pfrommer , Philipp Girichidis , Maria Werhahn , Matteo Pais

Modeling particle acceleration and non-thermal emission in supernova remnants

According to the most popular model for the origin of cosmic rays (CRs), supernova remnants (SNRs) are the site where CRs are accelerated. Observations across the electromagnetic spectrum support this picture through the detection of…

High Energy Astrophysical Phenomena · Physics 2021-01-27 S. Orlando , M. Miceli , S. Ustamujic , A. Tutone , E. Greco , O. Petruk , F. Bocchino , G. Peres

Galactic Gamma-Ray Background Radiation from Supernova Remnants

The contribution of the Source Cosmic Rays (SCRs), confined in Supernova Remnants, to the diffuse high energy \gr emission above 1 GeV from the Galactic disk is studied. \grs produced by the SCRs have a much harder spectrum compared with…

Astrophysics · Physics 2010-12-03 Evgeny G. Berezhko , Heinrich J. Voelk

On the mechanism for breaks in the cosmic ray spectrum

The proof of cosmic ray (CR) origin in supernova remnants (SNR) must hinge on full consistency of the CR acceleration theory with the observations; direct proof is impossible because of the orbit stochasticity of CR particles. Recent…

Astrophysics of Galaxies · Physics 2016-10-11 M. A. Malkov , P. H. Diamond , R. Z. Sagdeev

Nonthermal radiation of young supernova remnants: the case of Cas A

The processes responsible for the broad-band radiation of the young supernova remnant Cas A are explored using a new code which is designed for a detailed treatment of the diffusive shock acceleration of particles in nonlinear regime. The…

High Energy Astrophysical Phenomena · Physics 2015-06-16 V. N. Zirakashvili , F. A. Aharonian , R. Yang , E. Ona-Wilhelmi , R. J. Tuffs

Multiple accelerated particle populations in the Cygnus Loop with Fermi-LAT

The Cygnus Loop (G74.0-8.5) is a very well-known nearby supernova remnant (SNR) in our Galaxy. Thanks to its large size, brightness, and angular offset from the Galactic plane, it has been studied in detail from radio to $\gamma$-ray…

High Energy Astrophysical Phenomena · Physics 2021-12-15 A. Tutone , J. Ballet , F. Acero , A. D'Aì , G. Cusumano

Observation of VHE gamma-rays from Cassiopeia A with the MAGIC telescope

We searched for very high energy (VHE) gamma-ray emission from the supernova remnant Cassiopeia A. The shell-type supernova remnant Cassiopeia A was observed with the 17 meter MAGIC telescope between July 2006 and January 2007 for a total…

Astrophysics · Physics 2019-08-12 J. Albert

Supernova progenitor stars in the initial range of 23 to 33 solar masses and their relation with the SNR Cas A

Multi wavelength observations of Cassiopeia A (Cas A) have provided us with a strong evidence for the presence of circumstellar material surrounding the progenitor star. It has been suggested that its progenitor was a massive star with a…

Solar and Stellar Astrophysics · Physics 2015-05-13 B. Perez-Rendon , G. Garcia-Segura , N. Langer

Characterization of the GeV emission from the Kepler supernova remnant

The Kepler supernova remnant (SNR) is the only historic supernova remnant lacking a detection at GeV and TeV energies which probe particle acceleration. A recent analysis of Fermi-LAT data reported a likely GeV gamma-ray candidate in the…

High Energy Astrophysical Phenomena · Physics 2022-05-04 Fabio Acero , Marianne Lemoine-Goumard , Jean Ballet

Spitzer Spectral Mapping of Supernova Remnant Cassiopeia A

We present the global distribution of fine structure infrared line emission in the Cassiopeia A supernova remnant using data from the Spitzer Space Telescope's Infrared Spectrograph. We identify emission from ejecta materials in the…

Astrophysics · Physics 2011-02-11 J. D. T. Smith , Lawrence Rudnick , Tracey Delaney , Jeonghee Rho , Haley Gomez , Takashi Kozasa , William Reach , Karl Isensee

Probing Low-Luminosity Gamma-Ray Emission from SNR G296.5+10.0 and CCO 1E 1207.4-5209 with CTAO

The acceleration mechanisms of cosmic rays (CR) in supernova remnants (SNRs) and their associated compact central objects (CCOs) remain an open question in high-energy astrophysics. In this study, we perform a modeling of CR transport and…

High Energy Astrophysical Phenomena · Physics 2026-05-22 Luana N. Padilha , Rubens Jr. Costa , Rita C. dos Anjos , Jaziel G. Coelho

Constraints on cosmic-ray efficiency in the supernova remnant RCW 86 using multi-wavelength observations

Several young supernova remnants (SNRs) have recently been detected in the high-energy and very-high-energy gamma-ray domains. As exemplified by RX J1713.7-3946, the nature of this emission has been hotly debated, and direct evidence for…

High Energy Astrophysical Phenomena · Physics 2015-06-05 M. Lemoine-Goumard , M. Renaud , J. Vink , G. E. Allen , A. Bamba , F. Giordano , Y. Uchiyama

Neutral pion emission from accelerated protons in the supernova remnant W44

We present the AGILE gamma-ray observations in the energy range 50 MeV - 10 GeV of the supernova remnant (SNR) W44, one of the most interesting systems for studying cosmic-ray production. W44 is an intermediate-age SNR (20, 000 years) and…

High Energy Astrophysical Phenomena · Physics 2015-06-03 A. Giuliani , M. Cardillo , M. Tavani , Y. Fukui , S. Yoshiike , K. Torii , G. Dubner , G. Castelletti , G. Barbiellini , A. Bulgarelli , P. Caraveo , E. Costa , P. W. Cattaneo , A. Chen , T. Contessi , E. Del Monte , I. Donnarumma , Y. Evangelista , M. Feroci , F. Gianotti , F. Lazzarotto , F. Lucarelli , F. Longo , M. Marisaldi , S. Mereghetti , L. Pacciani , A. Pellizzoni , G. Piano , P. Picozza , C. Pittori , G. Pucella , M. Rapisarda , A. Rappoldi , S. Sabatini , P. Soffitta , E. Striani , M. Trifoglio , A. Trois , S. Vercellone , F. Verrecchia , V. Vittorini , S. Colafrancesco , P. Giommi , G. Bignami