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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
The X-ray synchrotron emission of RCW 86 and the implications for its age
Astrophysical Journal, Volume 648, No. 1 II, Year 2006
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Description
We report X-ray imaging spectroscopy observations of the northeastern shell of the supernova remnant RCW 86 using Chandra and XMM-Newton. Along this part of the shell, the dominant X-ray radiation mechanism changes from thermal to synchrotron emission. We argue that both the presence of X-ray synchrotron radiation and the width of the synchrotron-emitting region suggest a locally higher shock velocity of Vs ≈ 2700 km s-1 and a magnetic field of B ≈ 24 ± 5 μG. Moreover, we also show that a simple power-law cosmic-ray electron spectrum with an exponential cutoff cannot explain the broadband synchrotron emission. Instead, a concave electron spectrum is needed, as predicted by nonlinear shock acceleration models. Finally, we show that the derived shock velocity strengthens the case that RCW 86 is the remnant of SN 185. © 2006. The American Astronomical Society. All rights reserved.
Authors & Co-Authors
Vink, Jacco S.
Netherlands, Utrecht
Sterrenkundig Instituut Utrecht
Netherlands, Utrecht
Sron Netherlands Institute for Space Research
Bleeker, Johan A.M.
Netherlands, Utrecht
Sterrenkundig Instituut Utrecht
Netherlands, Utrecht
Sron Netherlands Institute for Space Research
van der Heyden, Kurt J.
South Africa, Cape Town
South African Astronomical Observatory
Bykov, Andrei M.
Russian Federation, Saint Petersburg
Ioffe Institute
Bamba, Aya
Japan, Wako
Riken
Yamazaki, Ryo
Japan, Higashihiroshima
Hiroshima University
Statistics
Citations: 92
Authors: 6
Affiliations: 6
Identifiers
Doi:
10.1086/507628
ISSN:
0004637X
e-ISSN:
15384357
Research Areas
Cancer
Environmental