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Detecting Thermal X-Ray Emission and Proper Motions in RX J1713.7-3946

Published online by Cambridge University Press:  17 October 2017

Satoru Katsuda
Affiliation:
Department of Physics, Faculty of Science & Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo, Tokyo 112-8551, Japan email: katsuda@phys.chuo-u.ac.jp
Fabio Acero
Affiliation:
Laboratoire AIM, IRFU/SAp – CEA/DRF – CNRS – Universite Paris Diderot, Bat. 709, CEA-Saclay, Gif-sur-Yvette Cedex, France
Nozomu Tominaga
Affiliation:
Department of Physics, Faculty of Science and Engineering, Konan University, 8-9-1 Okamoto, Kobe, Hyogo 658-8501, Japan Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583, Japan
Jean Ballet
Affiliation:
Laboratoire AIM, IRFU/SAp – CEA/DRF – CNRS – Universite Paris Diderot, Bat. 709, CEA-Saclay, Gif-sur-Yvette Cedex, France
Yasuo Fukui
Affiliation:
Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
Junko S. Hiraga
Affiliation:
Department of Physics, School of Science and Technology, Kwansei Gakuin University, Sanda 669-1337, Japan
Katsuji Koyama
Affiliation:
Department of Physics, Graduate School of Science, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
Shiu-Hang Lee
Affiliation:
Department of Astronomy, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
Koji Mori
Affiliation:
Department of Applied Physics and Electronic Engineering, Faculty of Engineering, University of Miyazaki, 1-1 Gakuen Kibanadai-Nishi, Miyazaki 889-2192, Japan
Shigehiro Nagataki
Affiliation:
Astrophysical Big Bang Laboratory, Riken, Wako, Saitama 351-0198, Japan
Yutaka Ohira
Affiliation:
Department of Physics and Mathematics, Aoyama-Gakuin University, Sagamihara, Kanagawa 252-5258, Japan
Robert Petre
Affiliation:
Astrophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
Hidetoshi Sano
Affiliation:
Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan Institute for Advanced Research, Nagoya University, Furo-cho, Chikusa-Ku, Nagoya 464-8601, Japan
Yoko Takeuchi
Affiliation:
High Energy Astrophysics Laboratory, RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
Toru Tamagawa
Affiliation:
High Energy Astrophysics Laboratory, RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
Naomi Tsuji
Affiliation:
Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima, Tokyo 171-8501, Japan
Hiroshi Tsunemi
Affiliation:
Department of Earth and Space Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
Yasunobu Uchiyama
Affiliation:
Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima, Tokyo 171-8501, Japan
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Abstract

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We report detections of thermal X-ray line emission and proper motions in the supernova remnant (SNR) RX J1713.7-3946, the prototype of the small class of synchrotron dominated SNRs. Based on deep XMM-Newton observations, we find clear line features including Ne Lyα, Mg Heα, and Si Heα from the central portion of the remnant. The metal abundance ratios suggest that the thermal emission originates from core-collapse SN ejecta arising from a relatively low-mass (≲20 M) progenitor. In addition, using XMM-Newton observations on a 13 yr time interval, we have measured expansion in the southeastern rim to be ~0.75″ yr−1 or ~3500 km s−1 at a distance of 1 kpc. Given this, we derive an upstream density to be ~0.01 cm−3, compatible with the lack of thermal X-rays from the shocked ambient medium. We also estimate the age of the remnant to be ~1200–1600 yr, roughly consistent with the idea that RX J1713.7-3946 is the remnant of SN 393.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2017 

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