The bi-modal Li-7 distribution of the Milky Way's thin-disk dwarf stars The role of Galactic-scale events and stellar evolution

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dc.contributor.authorRoca Fábrega, Santi
dc.contributor.authorLlorente de Andrés, F.
dc.contributor.authorChavero, C.
dc.contributor.authorCifuentes, C.
dc.contributor.authorde la Reza, R.
dc.date.accessioned2023-06-16T14:23:54Z
dc.date.available2023-06-16T14:23:54Z
dc.date.issued2021-12-03
dc.descriptionWe thank the anonymous reviewer for his/her comments and suggestions that helped us improve this manuscript. SFR acknowledges support from a Spanish postdoctoral fellowship `Ayudas para la atracción del talento investigador. Modalidad 2: jóvenes investigadores, financiadas por la Comunidad de Madrid' under grant number 2017-T2/TIC-5592. His work has been supported by the Madrid Government (Comunidad de Madrid-Spain) under the Multiannual Agreement with Complutense University in the line Program to Stimulate Research for Young Doctors in the context of the V PRICIT (Regional Programme of Research and Technological Innovation). SRF and CC acknowledge financial support from the Spanish Ministry of Economy and Competitiveness (MINECO) under grant number AYA2016-75808-R, AYA2017-90589REDT, YA2016-79425-C3-2-P, and S2018/NMT-429, and from the CAM-UCM under grant number PR65/19-22462. FLA and R de la R. acknowledge support from the Faculty of the European Space Astronomy Centre (ESAC) Funding references 569 and 570, respectively. FLA would like to thank the technical support provided by A. Parras (CAB), Dr. J. A. Prieto (UCLM) and MSc J. Gómez-Malagón. This research has made use of the Spanish Virtual Observatory (http://svo.cab.inta-csic.es) supported from the Spanish MICINN/FEDER through grant AyA2017-84089. This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program.
dc.description.abstractContext. The lithium abundance, A(Li), in stellar atmospheres suffers from various enhancement and depletion processes during the star's lifetime. While several studies have demonstrated that these processes are linked to the physics of stellar formation and evolution, the role that Galactic-scale events play in the galactic A(Li) evolution is not yet well understood. Aims. We aim to demonstrate that the observed A(Li) bi-modal distribution, in particular in the FGK-dwarf population, is not a statistical artefact and that the two populations connect through a region with a low number of stars. We also want to investigate the role that Galactic-scale events play in shaping the A(Li) distribution of stars in the thin disk. Methods. We use statistical techniques along with a Galactic chemical evolution model for A(Li) that includes most of the well-known Li-7 production and depletion channels. Results. We confirm that the FGK main-sequence stars belonging to the Milky Way's thin disk present a bi-modal A(Li) distribution. We demonstrate that this bi-modality can be generated by a particular Milky Way star formation history profile combined with the stellar evolution's Li-7 depletion mechanisms. We show that A(Li) evolution can be used as an additional proxy for the star formation history of our Galaxy.
dc.description.departmentDepto. de Física de la Tierra y Astrofísica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Economía y Competitividad (MINECO)
dc.description.sponsorshipMinisterio de Ciencia e Innovación (MICINN)/FEDER
dc.description.sponsorshipComunidad de Madrid
dc.description.sponsorshipUniversidad Complutense de Madrid/Comunidad de Madrid
dc.description.sponsorshipFaculty of the European Space Astronomy Centre (ESAC)
dc.description.sponsorshipNational Aeronautics and Space Administration (NASA)
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/72782
dc.identifier.doi10.1051/0004-6361/202141280
dc.identifier.issn0004-6361
dc.identifier.officialurlhttp://dx.doi.org/10.1051/0004-6361/202141280
dc.identifier.relatedurlhttps://www.aanda.org/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/4930
dc.journal.titleAstronomy & Astrophysics
dc.language.isoeng
dc.publisherEDP Sciencies
dc.relation.projectIDAYA2016-75808-R, AYA2017-90589- REDT,A YA2016-79425-C3-2-P
dc.relation.projectIDAyA2017-84089
dc.relation.projectID2017-T2/TIC-5592; S2018/NMT-429
dc.relation.projectIDPR65/19-22462
dc.relation.projectID569
dc.relation.projectID570
dc.rights.accessRightsopen access
dc.subject.cdu52
dc.subject.keywordChemical abundances
dc.subject.keywordBeryllium abundances
dc.subject.keywordCosmic-rays
dc.subject.keywordS-process
dc.subject.keywordLithium
dc.subject.keywordMetallicity
dc.subject.keywordHalo
dc.subject.keywordParameters
dc.subject.keywordDepletion
dc.subject.keywordRotation
dc.subject.ucmAstrofísica
dc.titleThe bi-modal Li-7 distribution of the Milky Way's thin-disk dwarf stars The role of Galactic-scale events and stellar evolution
dc.typejournal article
dc.volume.number656
dspace.entity.typePublication
relation.isAuthorOfPublicationbd325c18-ac56-4302-a8f3-4dc8f54691f3
relation.isAuthorOfPublication.latestForDiscoverybd325c18-ac56-4302-a8f3-4dc8f54691f3
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