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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/20.500.12386/31555
DC FieldValueLanguage
dc.contributor.authorLiu, Nanen_US
dc.contributor.authorBarosch, Jensen_US
dc.contributor.authorNittler, Larry R.en_US
dc.contributor.authorConel, Conel M.en_US
dc.contributor.authorWang, Jianhuaen_US
dc.contributor.authorCRISTALLO, Sergioen_US
dc.contributor.authorBusso, Maurizioen_US
dc.contributor.authorPalmerini, Saraen_US
dc.date.accessioned2022-03-11T15:52:55Z-
dc.date.available2022-03-11T15:52:55Z-
dc.date.issued2021en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/20.500.12386/31555-
dc.description.abstractWe report NanoSIMS Si and Mg-Al isotopic data (and C, N, and Ti isotopic data, when available) for 85 submicron- to micron-sized presolar SiC grains from the CM2 Murchison meteorite, including 60 mainstream (MS), 8 AB1, 8 X, 7 AB2, and 2 Y grains. The MS and Y grain data demonstrate that (1) C and N contamination mainly appears as surface contamination, and sufficient presputtering is needed to expose a clean grain surface for obtaining intrinsic C and N signals, and (2) Mg and Al contamination appears as adjacent grains and rims, and high-resolution imaging and the choice of small regions of interest during data reduction together are effective in suppressing the contamination. Our results strongly indicate that previous studies of presolar SiC grains could have sampled differing degrees of contamination for C, N, Mg, and Al. Compared to the literature data, our new MS and Y grains are in better agreement with carbon star observations for both the C and N isotopic ratios. By comparing our new, tighter distributions of 12C/13C, 14N/15N, and initial 26Al/27Al ratios for MS and Y grains with FRUITY low-mass asymptotic giant branch (AGB) stellar models, we provide more stringent constraints on the occurrence of cool bottom processing and the production of 26Al in N-type carbon stars, which are classical AGB stars.en_US
dc.language.isoengen_US
dc.titleNew Multielement Isotopic Compositions of Presolar SiC Grains: Implications for Their Stellar Originsen_US
dc.typeArticle-
dc.identifier.doi10.3847/2041-8213/ac260ben_US
dc.identifier.scopus2-s2.0-85118106477en_US
dc.identifier.isiWOS:000706469900001en_US
dc.identifier.urlhttps://iopscience.iop.org/article/10.3847/2041-8213/ac260ben_US
dc.identifier.urlhttps://api.elsevier.com/content/abstract/scopus_id/85118106477en_US
dc.relation.mediumSTAMPAen_US
dc.relation.volume920en_US
dc.relation.issue1en_US
dc.relation.firstpageL26en_US
dc.type.refereeREF_1en_US
dc.description.numberofauthors8en_US
dc.description.internationalsìen_US
dc.contributor.countryITAen_US
dc.contributor.countryUSAen_US
dc.relation.scientificsectorFIS/05 - ASTRONOMIA E ASTROFISICAen_US
dc.relation.journalTHE ASTROPHYSICAL JOURNAL LETTERSen_US
dc.type.miur262 Articolo in rivista-
dc.identifier.adsbibcode2021ApJ...920L..26Len_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.grantfulltextopen-
item.fulltextWith Fulltext-
item.openairetypeArticle-
item.languageiso639-1en-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
crisitem.journal.journalissn2041-8205-
crisitem.journal.anceE196528-
crisitem.author.deptO.A. Abruzzo-
crisitem.author.orcid0000-0001-9683-9406-
Appears in Collections:1.01 Articoli in rivista
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Liu_2021_ApJL_920_26.pdf[Administrators only]1.43 MBAdobe PDFView/Open
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