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The Gaia-ESO Survey :
The Gaia-ESO Survey : Probing the lithium abundances in old metal-rich dwarf stars in the solar vicinity
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- Dantas, M. L. L. (författare)
- Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland.,Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences,INAF - Osservatorio Astrofisico di Arcetri
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- Guiglion, G. (författare)
- Max Planck Inst Astron, Konnigstuhl 17, D-69117 Heidelberg, Germany.;Leibniz Inst Astrophys Potsdam AIP, Sternwarte 16, D-14482 Potsdam, Germany.,Max Planck Institute for Astronomy,Leibniz Institute for Astrophysics Potsdam (AIP),Vilnius University,University of Cambridge
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- Smiljanic, R. (författare)
- Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland.,Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences,INAF - Osservatorio Astrofisico di Arcetri
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- Romano, D. (författare)
- INAF Osservatorio Astrofis & Sci Spazio Bologna, Via Gobetti 93-3, I-40129 Bologna, Italy.,INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Bologna
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- Magrini, L. (författare)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.
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- Bensby, T. (författare)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
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- Chiappini, C. (författare)
- Leibniz Inst Astrophys Potsdam AIP, Sternwarte 16, D-14482 Potsdam, Germany.,Leibniz Institute for Astrophysics Potsdam (AIP),University of Catania
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- Franciosini, E. (författare)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri
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- Nepal, S. (författare)
- Leibniz Inst Astrophys Potsdam AIP, Sternwarte 16, D-14482 Potsdam, Germany.;Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany.,University of Potsdam,Leibniz Institute for Astrophysics Potsdam (AIP)
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- Tautvaisiene, G. (författare)
- Vilnius Univ, Inst Theoret Phys & Astron, Sauletekio Av 3, LT-10257 Vilnius, Lithuania.
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- Gilmore, G. (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.
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- Randich, S. (författare)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.
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- Lanzafame, A. C. (författare)
- Univ Catania, Sez Astrofis, Dipartimento Fis & Astron, Via S Sofia 78, I-95123 Catania, Italy.
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- Heiter, Ulrike (författare)
- Uppsala University,Uppsala universitet,Observationell astrofysik
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- Morbidelli, L. (författare)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.
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- Prisinzano, L. (författare)
- INAF Osservatorio Astron Palermo, Piazza Parlamento 1, I-90134 Palermo, Italy.,INAF Palermo Astronomical Observatory
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- Zaggia, S. (författare)
- INAF Padova Observ, Vicolo Osservatorio 5, I-35122 Padua, Italy.,INAF-Osservatorio Astronomico di Roma
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Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences (creator_code:org_t)
- 2022-12-09
- 2022
- Engelska.
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 668
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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http://dx.doi.org/10... (free)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://lup.lub.lu.s...
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Abstract
Ämnesord
Stäng
- Context: Lithium (Li) is a fragile element that is produced in a variety of sites but can also be very easily depleted in stellar photospheres. Radial migration has been reported to explain the decrease in the upper envelope of Li measurements observed for relatively old metal-rich dwarf stars in some surveys.Aims: We test a scenario in which radial migration could affect the Li abundance pattern of dwarf stars in the solar neighbourhood. This may confirm that the Li abundances in these stars cannot serve as a probe for the Li abundance in the interstellar medium (ISM). In other words, to probe the evolution of the Li abundance in the local ISM, it is crucial that stellar intruders be identified and removed from the adopted sample.Methods: We used the high-quality data (including Li abundances) from the sixth internal Data Release of the Gaia-ESO survey. In this sample we grouped stars by similarity in chemical abundances via hierarchical clustering. Our analysis treats both measured Li abundances and upper limits.Results: The Li envelope of the previously identified radially migrated stars is well below the benchmark meteoritic value (<3.26 dex); the star with the highest detected abundance has A(Li) = 2.76 dex. This confirms the previous trends observed for old dwarf stars (median ages similar to 8 Gyr), where Li decreases for [Fe/H] greater than or similar to 0.Conclusions: This result is supporting evidence that the abundance of Li measured in the upper envelope of old dwarf stars should not be considered a proxy for the ISM Li. Our scenario also indicates that the stellar yields for [M/H] >0 should not be decreased, as recently proposed in the literature. Our study backs recent studies that claim that old dwarfs on the hot side of the dip are efficient probes of the ISM abundance of Li, provided atomic diffusion does not significantly lower the initial Li abundance in the atmospheres of metal-rich objects.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- Galaxy: abundances
- Galaxy: evolution
- Galaxy: stellar content
- stars: abundances
- ISM: abundances
- Galaxy: abundances
- Galaxy: evolution
- Galaxy: stellar content
- ISM: abundances
- Stars: abundances
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Dantas, M. L. L.
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Guiglion, G.
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Smiljanic, R.
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Romano, D.
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Magrini, L.
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Bensby, T.
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Chiappini, C.
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Franciosini, E.
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Nepal, S.
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Tautvaisiene, G.
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Gilmore, G.
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Randich, S.
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Lanzafame, A. C.
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Heiter, Ulrike
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Morbidelli, L.
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Prisinzano, L.
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Zaggia, S.
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