Extremely fast acceleration of cosmic rays in a supernova remnant

Yasunobu Uchiyama (), Felix A. Aharonian, Takaaki Tanaka, Tadayuki Takahashi and Yoshitomo Maeda
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Yasunobu Uchiyama: Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA), 3-1-1 Yoshinodai, Sagamihara, Kanagawa, 229-8510, Japan
Felix A. Aharonian: Dublin Institute for Advanced Studies, 5 Merrion Square, Dublin 2, Ireland
Takaaki Tanaka: Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA), 3-1-1 Yoshinodai, Sagamihara, Kanagawa, 229-8510, Japan
Tadayuki Takahashi: Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA), 3-1-1 Yoshinodai, Sagamihara, Kanagawa, 229-8510, Japan
Yoshitomo Maeda: Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA), 3-1-1 Yoshinodai, Sagamihara, Kanagawa, 229-8510, Japan

Nature, 2007, vol. 449, issue 7162, 576-578

Abstract: Quick-fire cosmic rays New data from the orbiting Chandra X-ray observatory reveal that the X-ray hot spots in the shell of supernova remnant SNR RX J1713.7-3946 undergo brightening and decay on a one-year timescale. This supernova remnant is unusual in that its X-ray emissions are largely non-thermal in origin. The rapid variability points to ultrarelativistic electrons acting via a synchrotron process as the probable X-ray source. All this adds up to unexpectedly rapid cosmic-ray acceleration in a magnetic field amplified by a factor of more than 100.

Date: 2007
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DOI: 10.1038/nature06210

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