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Title:
Discovery of Non-Thermal X-Rays from the Northwest Shell of the New SNR RX J1713.7-3946: The Second SN 1006?
Authors:
Koyama, Katsuji; Kinugasa, Kenzo; Matsuzaki, Keiichi; Nishiuchi, Mamiko; Sugizaki, Mutsumi; Torii, Ken'ichi; Yamauchi, Shigeo; Aschenbach, Bernd
Affiliation:
AA(Department of Physics, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-01; E-mail(KK): and CREST: Japan Science and Technology Corporation (JST), 4-1-8 Honmachi, Kawaguchi, Saitama 332), AB(Department of Earth and Space Science, Faculty of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560), AC(Department of Physics, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo), AD(Department of Physics, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-01; E-mail(KK): ), AE(The Institute of Space and Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229), AF(Department of Earth and Space Science, Faculty of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560), AG(Faculty of Humanities and Social Sciences, Iwate University, 3-18-34 Ueda, Morioka, Iwate 020), AH(Max-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse, D-85740 Garching, Germany})
Publication:
Publ. of the Astronomical Society of Japan, v.49, p.L7-L11. (PASJ Homepage)
Publication Date:
06/1997
Origin:
PASJ
PASJ Keywords:
INTERSTELLAR : INDIVIDUAL (RX J17137-3946), RADIATION MECHANISM, SUPERNOVA REMNANTS, X-RAYS: SOURCES, X-RAYS: SPECTRA
Bibliographic Code:
1997PASJ...49L...7K

Abstract

We report on the ASCA results of a featureless X-ray spectrum from RX J1713.7-3946, a new shell-like SNR discovered with the ROSAT all-sky survey. The northwest part of RX J1713.7-3946 was in the field of the ASCA Galactic Plane Survey Project, and was found to exhibit a shell-like structure. The spectrum, however, shows neither line emission nor any signature of a thermal origin. Instead, a power-law model with a photon index of 2.4--2.5 gives a reasonable fit to the spectrum, suggesting a non-thermal origin. Together with the similarity to SN 1006, we propose that RX J1713.7-3946 is the second example, after SN 1006, of synchrotron X-ray radiation from a shell of SNRs. Since the synchrotron X-rays suggest the existence of extremely high energy charged particles in the SNR shell, our discovery should have a strong impact on the origin of cosmic X-rays.

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