Evidence for cosmic ray acceleration in supernova remnants from X-ray observations

2001 ◽  
Author(s):  
R. Petre
Keyword(s):  
Supernova Remnants ◽  
Cosmic Ray ◽  
X Ray ◽  
Cosmic Ray Acceleration

scholarly journals Search for Nonthermal X-Rays from Supernova Remnant Shells

1998 ◽  
Vol 188 ◽  
pp. 117-120
Author(s):  
R. Petre ◽  
J. Keohane ◽  
U. Hwang ◽  
G. Allen ◽  
E. Gotthelf
Keyword(s):  
Radio Emission ◽  
Supernova Remnants ◽  
Supernova Remnant ◽  
Cosmic Ray ◽  
High Energy ◽  
X Rays ◽  
X Ray ◽  
Nonthermal Radio ◽  
Cosmic Ray Acceleration ◽  
Nonthermal Radio Emission

The suggestion that the shocks of supernova remnants (SNR's) are cosmic ray acceleration sites dates back more than 40 years. While observations of nonthermal radio emission from SNR shells indicate the ubiquity of GeV cosmic ray production, there is still theoretical debate about whether SNR shocks accelerate particles up to the well-known “knee” in the primary cosmic ray spectrum at ~3,000 TeV. Recent X-ray observations of SN1006 and other SNR's may have provided the missing observational link between SNR shocks and high energy cosmic ray acceleration. We discuss these observations and their interpretation, and summarize our ongoing efforts to find evidence from X-ray observations of cosmic ray acceleration in the shells of other SNR's.

scholarly journals X-ray Emission as an Indicator of Cosmic ray Acceleration in Supernova Remnants

2000 ◽  
Vol 195 ◽  
pp. 69-76
Author(s):  
R. Petre ◽  
G. E. Allen ◽  
U. Hwang ◽  
J. W. Keohane ◽  
E. V. Gotthelf
Keyword(s):  
Supernova Remnants ◽  
Cosmic Ray ◽  
Systematic Investigation ◽  
Shock Acceleration ◽  
Acceleration Process ◽  
X Ray ◽  
Cosmic Ray Acceleration ◽  
The Status ◽  
Tev Gamma Rays ◽  
Cas A

X-ray observations over the past several years have led to the discovery of nonthermal X-ray emission arising in the shells of many young supernova remnants, including SN 1006, Cas A, and Tycho. This emission is thought to be synchrotron emission from electrons that have been shock accelerated to hundreds of TeV, and thus represents strong evidence that cosmic rays are accelerated in SNR shocks. The X-ray observations are corroborated by detection of TeV gamma rays from two of these remnants. A systematic investigation of young, shell-like remnants suggests that the nonthermal X-ray emission from shock-accelerated electrons is a common, if not ubiquitous, feature. We review the status of the X-ray observations and describe how they can be used to provide insight into the shock acceleration process.

Supernova Remnants: An Introductory Review

2004 ◽  
Vol 218 ◽  
pp. 57-64
Author(s):  
Jacco Vink
Keyword(s):  
Cosmic Rays ◽  
Supernova Remnants ◽  
Supernova Remnant ◽  
Cosmic Ray ◽  
Recent Advances ◽  
Cosmic Ray Acceleration ◽  
Introductory Review

The two main aspects of supernova remnant research addressed in this review are: I. What is our understanding of the progenitors of the observed remnants, and what have we learned from these remnants about supernova nucleosynthesis? II. Supernova remnants are probably the major source of cosmic rays. What are the recent advances in the observational aspects of cosmic ray acceleration in supernova remnants?

scholarly journals Multiwavelength Signatures of Cosmic Ray Acceleration by Young Supernova Remnants

2008 ◽  
Author(s):  
Jacco Vink ◽  
Felix A. Aharonian ◽  
Werner Hofmann ◽  
Frank Rieger
Keyword(s):  
Supernova Remnants ◽  
Cosmic Ray ◽  
Cosmic Ray Acceleration

scholarly journals Interaction between molecular clouds and MeV–TeV cosmic-ray protons escaped from supernova remnants

2019 ◽  
Vol 71 (4) ◽  
Author(s):  
Ken Makino ◽  
Yutaka Fujita ◽  
Kumiko K Nobukawa ◽  
Hironori Matsumoto ◽  
Yutaka Ohira
Keyword(s):  
Gamma Rays ◽  
Molecular Clouds ◽  
Supernova Remnants ◽  
Gamma Ray ◽  
Cosmic Ray ◽  
Iron Line ◽  
X Ray ◽  
Line Intensities ◽  
Neutral Gas ◽  
Additional Support

Abstract Recent discovery of the X-ray neutral iron line (Fe  i Kα at 6.40 keV) around several supernova remnants (SNRs) show that MeV cosmic-ray (CR) protons are distributed around the SNRs and are interacting with neutral gas there. We propose that these MeV CRs are the ones that have been accelerated at the SNRs together with GeV–TeV CRs. In our analytical model, the MeV CRs are still confined in the SNR when the SNR collides with molecular clouds. After the collision, the MeV CRs leak into the clouds and produce the neutral iron line emissions. On the other hand, GeV–TeV CRs had already escaped from the SNRs and emitted gamma-rays through interaction with molecular clouds surrounding the SNRs. We apply this model to the SNRs W 28 and W 44 and show that it can reproduce the observations of the iron line intensities and the gamma-ray spectra. This could be additional support of the hadronic scenario for the gamma-ray emissions from these SNRs.

Radio and X‐Ray Profiles in Supernova Remnants Undergoing Efficient Cosmic‐Ray Production

2005 ◽  
Vol 632 (2) ◽  
pp. 920-931 ◽  
Author(s):  
Donald C. Ellison ◽  
Gamil Cassam‐Chenai
Keyword(s):  
Supernova Remnants ◽  
Cosmic Ray ◽  
X Ray

scholarly journals COSMIC RAY ACCELERATION AT PERPENDICULAR SHOCKS IN SUPERNOVA REMNANTS

2014 ◽  
Vol 792 (2) ◽  
pp. 133 ◽  
Author(s):  
Gilles Ferrand ◽  
Rebecca J. Danos ◽  
Andreas Shalchi ◽  
Samar Safi-Harb ◽  
Paul Edmon ◽  
...  
Keyword(s):  
Supernova Remnants ◽  
Cosmic Ray ◽  
Cosmic Ray Acceleration
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