MATTER MIXING in CORE-COLLAPSE SUPERNOVA EJECTA: LARGE DENSITY PERTURBATIONS in the PROGENITOR STAR?

Jirong Mao, Masaomi Ono, Shigehiro Nagataki, Masa Aki Hashimoto, Hirotaka Ito, Jin Matsumoto, Maria G. Dainotti, Shiu Hang Lee

研究成果: ジャーナルへの寄稿記事

6 引用 (Scopus)

抄録

Matter mixing is one important topic in the study of core-collapse supernova (CCSN) explosions. In this paper, we perform two-dimensional hydrodynamic simulations to reproduce the high velocity 56Ni clumps observed in SN 1987A. This is the first time that large density perturbation is proposed in the CCSN progenitor to generate Rayleigh-Taylor (RT) instability and make the effective matter mixing. In the case of a spherical explosion, RT instability is efficient at both C+O/He and He/H interfaces of the SN progenitor. Radial coherent structures shown in perturbation patterns are important for obtaining high velocity 56Ni clumps. We can also obtain matter mixing features and high velocity 56Ni clumps in some cases of aspherical explosion. We find that one of the most favorable models in our work has a combination of bipolar and equatorially asymmetric explosions in which at least 25% of density perturbation is introduced at different composition interfaces of the CCSN progenitor. These simulation results are comparable to the observational findings of SN 1987A.

元の言語英語
記事番号164
ジャーナルAstrophysical Journal
808
発行部数2
DOI
出版物ステータス出版済み - 8 1 2015

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ejecta
supernovae
explosions
explosion
clumps
perturbation
Taylor instability
simulation
hydrodynamics

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

これを引用

Mao, J., Ono, M., Nagataki, S., Hashimoto, M. A., Ito, H., Matsumoto, J., ... Lee, S. H. (2015). MATTER MIXING in CORE-COLLAPSE SUPERNOVA EJECTA: LARGE DENSITY PERTURBATIONS in the PROGENITOR STAR? Astrophysical Journal, 808(2), [164]. https://doi.org/10.1088/0004-637X/808/2/164

MATTER MIXING in CORE-COLLAPSE SUPERNOVA EJECTA : LARGE DENSITY PERTURBATIONS in the PROGENITOR STAR? / Mao, Jirong; Ono, Masaomi; Nagataki, Shigehiro; Hashimoto, Masa Aki; Ito, Hirotaka; Matsumoto, Jin; Dainotti, Maria G.; Lee, Shiu Hang.

:: Astrophysical Journal, 巻 808, 番号 2, 164, 01.08.2015.

研究成果: ジャーナルへの寄稿記事

Mao, J, Ono, M, Nagataki, S, Hashimoto, MA, Ito, H, Matsumoto, J, Dainotti, MG & Lee, SH 2015, 'MATTER MIXING in CORE-COLLAPSE SUPERNOVA EJECTA: LARGE DENSITY PERTURBATIONS in the PROGENITOR STAR?', Astrophysical Journal, 巻. 808, 番号 2, 164. https://doi.org/10.1088/0004-637X/808/2/164
Mao, Jirong ; Ono, Masaomi ; Nagataki, Shigehiro ; Hashimoto, Masa Aki ; Ito, Hirotaka ; Matsumoto, Jin ; Dainotti, Maria G. ; Lee, Shiu Hang. / MATTER MIXING in CORE-COLLAPSE SUPERNOVA EJECTA : LARGE DENSITY PERTURBATIONS in the PROGENITOR STAR?. :: Astrophysical Journal. 2015 ; 巻 808, 番号 2.
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abstract = "Matter mixing is one important topic in the study of core-collapse supernova (CCSN) explosions. In this paper, we perform two-dimensional hydrodynamic simulations to reproduce the high velocity 56Ni clumps observed in SN 1987A. This is the first time that large density perturbation is proposed in the CCSN progenitor to generate Rayleigh-Taylor (RT) instability and make the effective matter mixing. In the case of a spherical explosion, RT instability is efficient at both C+O/He and He/H interfaces of the SN progenitor. Radial coherent structures shown in perturbation patterns are important for obtaining high velocity 56Ni clumps. We can also obtain matter mixing features and high velocity 56Ni clumps in some cases of aspherical explosion. We find that one of the most favorable models in our work has a combination of bipolar and equatorially asymmetric explosions in which at least 25{\%} of density perturbation is introduced at different composition interfaces of the CCSN progenitor. These simulation results are comparable to the observational findings of SN 1987A.",
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