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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/27162
DC FieldValueLanguage
dc.contributor.authorHachinger, S.en_US
dc.contributor.authorRöpke, F. K.en_US
dc.contributor.authorMazzali, P. A.en_US
dc.contributor.authorGal-Yam, A.en_US
dc.contributor.authorMaguire, K.en_US
dc.contributor.authorSullivan, M.en_US
dc.contributor.authorTaubenberger, S.en_US
dc.contributor.authorAshall, C.en_US
dc.contributor.authorCampbell, H.en_US
dc.contributor.authorELIAS DE LA ROSA, NANCY DEL CARMENen_US
dc.contributor.authorFeindt, U.en_US
dc.contributor.authorGREGGIO, Lauraen_US
dc.contributor.authorInserra, C.en_US
dc.contributor.authorMiluzio, M.en_US
dc.contributor.authorSmartt, S. J.en_US
dc.contributor.authorYoung, D.en_US
dc.date.accessioned2020-09-07T09:12:29Z-
dc.date.available2020-09-07T09:12:29Z-
dc.date.issued2017en_US
dc.identifier.issn0035-8711en_US
dc.identifier.urihttp://hdl.handle.net/20.500.12386/27162-
dc.description.abstractIn studies on intermediate- and high-resolution spectra of Type Ia supernovae (SNe Ia), some objects exhibit narrow Na I D absorptions often blueshifted with respect to the rest wavelength within the host galaxy. The absence of these in other SNe Ia may reflect that the explosions have different progenitors: blueshifted Na I D features might be explained by the outflows of 'single-degenerate' systems (binaries of a white dwarf with a non-degenerate companion). In this work, we search for systematic differences among SNe Ia for which the Na I D characteristics have been clearly established in previous studies. We perform an analysis of the chemical abundances in the outer ejecta of 13 'spectroscopically normal' SNe Ia (five of which show blueshifted Na lines), modelling time series of photospheric spectra with a radiative-transfer code. We find only moderate differences between 'blueshifted-Na', 'redshifted-Na' and 'no-Na' SNe Ia, so that we can neither conclusively confirm a 'one-scenario' nor a 'two-scenario' theory for normal SNe Ia. Yet, some of the trends we see should be further studied using larger observed samples: models for blueshifted-Na SNe tend to show higher photospheric velocities than no-Na SNe, corresponding to a higher opacity of the envelope. Consistently, blueshifted-Na SNe show hints of a somewhat larger iron-group content in the outer layers with respect to the no-Na subsample (and also to the redshifted-Na subsample). This agrees with earlier work where it was found that the light curves of no-Na SNe - often appearing in elliptical galaxies - are narrower, that is, decline more rapidly.en_US
dc.language.isoengen_US
dc.titleType Ia supernovae with and without blueshifted narrow Na I D lines - how different is their structure?en_US
dc.typeArticle-
dc.identifier.doi10.1093/mnras/stx1578en_US
dc.identifier.scopus2-s2.0-85052483334en_US
dc.identifier.isi000408211700030en_US
dc.identifier.urlhttps://academic.oup.com/mnras/article/471/1/491/3906590en_US
dc.relation.mediumSTAMPAen_US
dc.relation.volume471en_US
dc.relation.issue1en_US
dc.relation.firstpage491en_US
dc.relation.lastpage506en_US
dc.relation.numberofpages15en_US
dc.type.refereeREF_1en_US
dc.description.numberofauthors16en_US
dc.description.internationalsìen_US
dc.contributor.countryITAen_US
dc.contributor.countryGBRen_US
dc.contributor.countryDEUen_US
dc.contributor.countryESPen_US
dc.contributor.countryISRen_US
dc.contributor.countrySWEen_US
dc.relation.scientificsectorFIS/05 - ASTRONOMIA E ASTROFISICAen_US
dc.relation.journalMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETYen_US
dc.type.miur262 Articolo in rivista-
dc.identifier.adsbibcode2017MNRAS.471..491Hen_US
dc.description.apcnoen_US
dc.description.oa1 – prodotto con file in versione Open Access (allegare il file al passo  5-Carica)en_US
item.cerifentitytypePublications-
item.fulltextWith Fulltext-
item.openairetypeArticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.languageiso639-1en-
item.grantfulltextopen-
crisitem.author.deptO.A. Padova-
crisitem.author.deptO.A. Padova-
crisitem.author.orcid0000-0002-1381-9125-
crisitem.author.orcid0000-0003-2634-4875-
crisitem.journal.journalissn0035-8711-
crisitem.journal.anceE112946-
Appears in Collections:1.01 Articoli in rivista
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2017MNRAS.471..491H_MNRAS.pdfPdf editoriale1.3 MBAdobe PDFView/Open
2017MNRAS.471..491H_arxiv.pdfarxiv545.31 kBAdobe PDFView/Open
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