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Matter mixing in core-collapse supernova ejecta : large density perturbations in the progenitor star?

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Matter mixing in core-collapse supernova ejecta : large density perturbations in the progenitor star?

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dc.contributor.author Mao, Jirong pl
dc.contributor.author Ono, Masaomi pl
dc.contributor.author Nagataki, Shigehiro pl
dc.contributor.author Hashimoto, Masa-aki pl
dc.contributor.author Ito, Hirotaka pl
dc.contributor.author Matsumoto, Jin pl
dc.contributor.author Dainotti, Maria [SAP11020073] pl
dc.contributor.author Lee, Shiu-Hang pl
dc.date.accessioned 2015-11-19T14:02:00Z
dc.date.available 2015-11-19T14:02:00Z
dc.date.issued 2015 pl
dc.identifier.issn 0004-6256 pl
dc.identifier.uri http://ruj.uj.edu.pl/xmlui/handle/item/16941
dc.language eng pl
dc.rights Dodaję tylko opis bibliograficzny *
dc.rights.uri *
dc.title Matter mixing in core-collapse supernova ejecta : large density perturbations in the progenitor star? pl
dc.type JournalArticle pl
dc.abstract.en 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 ^{56} Ni 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 ^{56} Ni clumps. We can also obtain matter mixing features and high velocity ^{56} Ni 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. pl
dc.subject.en hydrodynamics pl
dc.subject.en instabilities pl
dc.subject.en nuclear reactions pl
dc.subject.en nucleosynthesis pl
dc.subject.en abundances pl
dc.subject.en supernovae: general pl
dc.description.volume 808 pl
dc.description.number 2 pl
dc.identifier.doi 10.1088/0004-637X/808/2/164 pl
dc.identifier.eissn 1538-3881 pl
dc.title.journal The Astrophysical Journal pl
dc.language.container eng pl
dc.affiliation Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomiczne pl
dc.subtype Article pl
dc.identifier.articleid 164 pl
dc.rights.original OTHER; otwarte czasopismo; ostateczna wersja wydawcy; po opublikowaniu; 12 pl
.pointsMNiSW [2015 A]: 35


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