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분출물 밀도분포에 따른 Ia형 초신성 잔해의 동력학 : 분출물 우세단계에서 세도브-테일러 단계 KCI 등재

DYNAMICS OF TYPE Ia SNRs WITH DIFFERENT DENSITY DISTRIBUTIONS : FROM EJECTA-DOMINANT TO SEDOV- TAYLOR STAGES

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  • URLhttps://db.koreascholar.com/Article/Detail/390275
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천문학논총 (Publications of the Korean Astronomical Society)
한국천문학회 (Korean Astronomical Society)
초록

We have simulated the interaction of supernova remnants with constant ambient medium to explore the dynamics of Type Ia supernova remnant. We assumed the supernova ejecta density distribution of the central constant and the outer power-law density distribution(ρ∝γ−n) (ρ∝γ−n) . We have calculated four different cases with different n. By scaling the length and time scales from the initial parameters-ejecta mass, ejecta energy, the ambient density, we could compare effects of the different density distribution of the ejecta on the dynamics of the SNRs. The radius of the outer forward shock converges the Sedov-Talyor solution at t' = 2.3 when the swept-up mass is 8 times of the ejecta mass. On the other hand, the motion of the reverse shock are largely affected by n. The ejecta with smaller n takes comparably long time to thermalize the whole ejecta at t′≃5.3,Msw≃18Mej t′≃5.3,Msw≃18Mej . We have applied our calculated results to obtain the ejecta density distributions of Tycho and SN1006 with n≃6 n≃6 .

저자
  • 최승언(서울대학교 사범대학 지구과학교육과) | CHOE SEUNG-URN (Department of Earth Science, College of Education, Seoul National University)
  • 정현철(서울대학교 사범대학 지구과학교육과) | JUNG HYUN-CHUL (Department of Earth Science, College of Education, Seoul National University)