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dc.contributor.authorKobayashi, Chiaki
dc.contributor.authorNomoto, Ken'ichi
dc.contributor.authorHachisu, Izumi
dc.date.accessioned2017-07-13T17:00:56Z
dc.date.available2017-07-13T17:00:56Z
dc.date.issued2015-04-23
dc.identifier.citationKobayashi , C , Nomoto , K & Hachisu , I 2015 , ' Subclasses of Type Ia Supernovae as the origin of [α/Fe] ratios in dwarf spheroidal galaxies ' , Astrophysical Journal Letters , vol. 804 , no. 1 . https://doi.org/10.1088/2041-8205/804/1/L24
dc.identifier.issn2041-8205
dc.identifier.otherPURE: 10327571
dc.identifier.otherPURE UUID: 538a971f-f181-4f20-b5cf-51618cef8787
dc.identifier.otherArXiv: http://arxiv.org/abs/1503.06739v2
dc.identifier.otherScopus: 84946156881
dc.identifier.otherORCID: /0000-0002-4343-0487/work/62750471
dc.identifier.urihttp://hdl.handle.net/2299/18922
dc.descriptionChiaki Kobayashi, Ken’ichi Nomoto, and Izumi Hachisu, “Subclasses of Type Ia Supernovae as the origin of [α/Fe] ratios in dwarf spheroidal galaxies”, The Astrophysical Journal Letters, Vol. 804(1), April 2015. © 2015. The American Astronomical Society.
dc.description.abstractRecent extensive observations of Type Ia Supernovae (SNe Ia) have revealed the existence of a diversity of SNe Ia, including SNe Iax. We introduce two possible channels in the single degenerate scenario: 1) double detonations in sub-Chandrasekhar (Ch) mass CO white dwarfs (WDs), where a thin He envelope is developed with relatively low accretion rates after He novae even at low metallicities, and 2) carbon deflagrations in Ch-mass possibly hybrid C+O+Ne WDs, where WD winds occur at [Fe/H] ~ -2.5 at high accretion rates. These subclasses of SNe Ia are rarer than `normal' SNe Ia and do not affect the chemical evolution in the solar neighborhood, but can be very important in metal-poor systems with stochastic star formation. In dwarf spheroidal galaxies in the Local Group, the decrease of [\alpha/Fe] ratios at [Fe/H] ~ -2 to -1.5 can be produced depending on the star formation history. SNe Iax give high [Mn/Fe], while sub-Ch-mass SNe Ia give low [Mn/Fe], and thus a model including a mix of the two is favoured by the available observations.en
dc.format.extent6
dc.language.isoeng
dc.relation.ispartofAstrophysical Journal Letters
dc.rightsOpen
dc.subjectastro-ph.GA
dc.subjectastro-ph.HE
dc.subjectastro-ph.SR
dc.titleSubclasses of Type Ia Supernovae as the origin of [α/Fe] ratios in dwarf spheroidal galaxiesen
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.description.statusPeer reviewed
dc.description.versiontypeFinal Published version
dcterms.dateAccepted2015-04-23
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.1088/2041-8205/804/1/L24
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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