Publications of The Korean Astronomical Society (천문학논총)

The Korean Astronomical Society (한국천문학회)
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CENTRALLY PEAKED X-RAY SNRS : CLOUD EVAPORATION AND THERMAL CONDUCTION

X-선 중심 가광 초신성 잔해 : 성간운 증발과 열전도 모델

  • CHOE SEUNG-URN (Department of Earth Science, College of Education, Seoul National University) ;
  • JUNG HYUN-CHUL (Department of Earth Science, College of Education, Seoul National University) ;
  • PARK BYEONG-GEON (Department of Earth Science, College of Education, Seoul National University)
  • 최승언 (서울대학교 사범대학 지구과학 교육과) ;
  • 정현철 (서울대학교 사범대학 지구과학 교육과) ;
  • 박병건 (서울대학교 사범대학 지구과학 교육과)
  • Published : 1999.12.01
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Abstract

We present the results of one-dimensional numerical simulations of SNR evolution in the in­homogeneous medium considering the effects of the evaporation of the cloud and the thermal conduction. We have included the effects of changing evaporation rate as a function of cloud size and the ambient temperature so that the clouds could be evaporated completely before they reach the center of the SNR. The heat conduction markedly changes the density distribution in the remnant interior. To explain the observed morphologies of the centrally peaked X-ray SNRs(for example W44), the maximal thermal conduction is required. However, this is unlikely due to the magnetic field and the turbulent motion. The effects of the evaporation of the cloud and the thermal conduction described here may explain the class of remnants observed to have centrally peaked X-ray emmision.

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