Dispersion of Inferred SNe Ia/SNe II Ratios for Current Models of Supernova Nucleosynthesis

Publications of the Astronomical Society of Japan

Hashimoto, Masa-aki³  Sato, Katsuhiko²  Nagataki, Shigehiro¹ 

[1] Department of Physics, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyoku, Tokyo 113-0033 E-mail(SN):;Department of Physics, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyoku, Tokyo 113-0033 E-mail(SN): Research Center for the Early Universe, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyoku, Tokyo 113-0033;Department of Physics, Faculty of Science, Kyusyu University, Ropponmatsu, Fukuoka 810

关键词: "Chemical evolution";    "Solar system";    "Sun: abundances";    Supernovae;   

DOI  :  10.1093/pasj/50.1.75

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

WehaveestimatedthedispersionoftheinferredrelativefrequenciesofType-IaandType-IIsupernovae(NIa/NII)inourGalaxybyfittingthenumericalresultsofsupernovanucleosynthesistothesolar-systemabundances.TheratioNIa/NIIisestimatedtobe0.056–0.14,whichisconsistentwiththeobservation,ifthemodelofWoosleyandWeaver(1995,AAA64.065.030WW95)isadoptedforType-IIsupernovae(SNeII).Ontheotherhand,theupperlimitofNIa/NIIbecomestoolargeforthemodelofHashimoto(1995,AAA64.065.034Ha95).However,Ha95canfitthesolarvaluesbetterthanWW95asfarastheabundantnucleiareconcerned.TheseresultsmeanthatHa95canreproducethemainnucleiofthesolar-systemwellandthatWW95canreproducethesolarvaluesoverawidemass-numberrange.WealsonotethatNIa/NIItendstobecomesmallerifthedelayeddetonationmodelisadoptedforType-Iasupernovae(SNeIa).ThedispersionofNIa/NIIobtainedinthepresentinvestigationislargerthanthatconcludedbyTsujimotoetal.(1995,AAA64.125.075),whichwillhaveaninfluenceontheestimateoftheaveragelifetimeofSNeIa'sprogenitorsand/orthestar-formationratehistoryinourgalaxy.

【 授权许可】

Unknown