Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/27677
DC Field | Value | Language |
---|---|---|
dc.contributor.author | DI MAURO, Maria Giuseppina | en_US |
dc.contributor.author | VENTURA, Rita | en_US |
dc.contributor.author | CORSARO, ENRICO MARIA NICOLA | en_US |
dc.contributor.author | Lustosa De Moura, Bruno | en_US |
dc.date.accessioned | 2020-10-07T15:51:53Z | - |
dc.date.available | 2020-10-07T15:51:53Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/27677 | - |
dc.description.abstract | We present the asteroseismic study of the early red-giant star KIC 4448777, complementing and integrating a previous work, aimed at characterizing the dynamics of its interior by analyzing the overall set of data collected by the Kepler satellite during the four years of its first nominal mission. We adopted the Bayesian inference code DIAMONDS for the peak bagging analysis and asteroseismic splitting inversion methods to derive the internal rotational profile of the star. The detection of new splittings of mixed modes, which are more concentrated in the very inner part of the helium core, allowed us to reconstruct the angular velocity profile deeper into the interior of the star and to disentangle the details better than in Paper I: the helium core rotates almost rigidly about 6 times faster than the convective envelope, while part of the hydrogen shell seems to rotate at a constant velocity about 1.15 times lower than the He core. In particular, we studied the internal shear layer between the fast-rotating radiative interior and the slow convective zone and we found that it lies partially inside the hydrogen shell above r ≃ 0.05R and extends across the core-envelope boundary. Finally, we theoretically explored the possibility for the future capabilty to sound the convective envelope in the red-giant stars and we concluded that the inversion of a set of splittings with only low-harmonic degree l ≤ 3, even supposing a very large number of modes, will not allow us to resolve the rotational profile of this region in detail. | en_US |
dc.language.iso | eng | en_US |
dc.title | The Rotational Shear Layer inside the Early Red-giant Star KIC 4448777 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/aac7c4 | en_US |
dc.identifier.scopus | 2-s2.0-85050698165 | en_US |
dc.identifier.isi | 000439236600009 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/aac7c4 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 862 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 9 | en_US |
dc.relation.lastpage | 19 | en_US |
dc.relation.numberofpages | 10 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 4 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | BRA | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTROPHYSICAL JOURNAL | en_US |
dc.type.miur | 262 Articolo in rivista | en_US |
dc.identifier.adsbibcode | 2018ApJ...862....9D | en_US |
dc.relation.fund | H2020 | en_US |
dc.relation.project | AstroFIt2 (Astronomy Fellowships in Italy 2) | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.orcid | 0000-0001-7801-7484 | - |
crisitem.author.orcid | 0000-0002-5152-0482 | - |
crisitem.author.orcid | 0000-0001-8835-2075 | - |
crisitem.project.grantno | 664931 | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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1805.09021.pdf | preprint | 568.22 kB | Adobe PDF | View/Open |
Di_Mauro_2018_ApJ_862_9.pdf | Pdf editoriale | 633.8 kB | Adobe PDF | View/Open |
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