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The Gaia-ESO Survey :
The Gaia-ESO Survey : a new approach to chemically characterising young open clusters I. Stellar parameters, and iron-peak, alpha-, and proton-capture elements
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- Baratella, M. (författare)
- Dipartimento Fis & Astron Galileo Galilei, Vicolo Osservatorio 3, I-35122 Padua, Italy,INAF - Osservatorio Astronomico di Padova
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- D'Orazi, V (författare)
- INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy;Monash Univ, Sch Phys & Astron, Monash Ctr Astrophys MoCA, Clayton, Vic 3800, Australia,INAF - Osservatorio Astronomico di Padova,Monash University
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- Carraro, G. (författare)
- Dipartimento Fis & Astron Galileo Galilei, Vicolo Osservatorio 3, I-35122 Padua, Italy
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- Desidera, S. (författare)
- INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy,INAF - Osservatorio Astronomico di Padova
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- Randich, S. (författare)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy,INAF - Osservatorio Astrofisico di Arcetri,Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
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- Magrini, L. (författare)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy,INAF - Osservatorio Astrofisico di Arcetri
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- Adibekyan, V (författare)
- Univ Porto, Inst Astrofis & Ciencias Espaco, CAUP, Rua Estrelas, P-4150762 Porto, Portugal,University of Porto
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- Smiljanic, R. (författare)
- Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland
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- Spina, L. (författare)
- Monash Univ, Sch Phys & Astron, Monash Ctr Astrophys MoCA, Clayton, Vic 3800, Australia,Monash University
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- Tsantaki, M. (författare)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy,INAF - Osservatorio Astrofisico di Arcetri
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- Tautvaisiene, G. (författare)
- Vilnius Univ, Inst Theoret Phys & Astron, Sauletekio Ay 3, LT-10257 Vilnius, Lithuania,Vilnius University
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- Sousa, S. G. (författare)
- Univ Porto, Inst Astrofis & Ciencias Espaco, CAUP, Rua Estrelas, P-4150762 Porto, Portugal,University of Porto,University of Cambridge,INAF - Osservatorio Astrofisico di Arcetri
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- Jofre, P. (författare)
- Univ Diego Portales, Fac Ingn, Nucl Astron, Av Ejercito 441, Santiago, Chile,Diego Portales University
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- Jimenez-Esteban, F. M. (författare)
- CSIC, INTA, Ctr Astrobiol, Dept Astrofis, ESAC Campus,Camino Bajo del Castillo S-N, Madrid 28692, Spain,European Space Astronomy Centre,INAF - Osservatorio Astrofisico di Arcetri
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- Delgado-Mena, E. (författare)
- Univ Porto, Inst Astrofis & Ciencias Espaco, CAUP, Rua Estrelas, P-4150762 Porto, Portugal,University of Porto
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- Martell, S. (författare)
- Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia;Ctr Excellence All Sky Astrophys Three Dimens AST, Sydney, NSW, Australia,University of New South Wales,INAF - Osservatorio Astrofisico di Arcetri
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- Van der Swaelmen, M. (författare)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy
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- Roccatagliata, V (författare)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy;Univ Pisa, Dipartimento Fis Enrico Fermi, Largo Pontecorvo 3, I-56127 Pisa, Italy,INAF - Osservatorio Astrofisico di Arcetri,University of Pisa
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- Gilmore, G. (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England
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- Alfaro, E. J. (författare)
- CSIC, Inst Astrofis Andalucia, Apdo 3004, E-18080 Granada, Spain,CSIC Instituto de Astrofísica de Andalucía (IAA)
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- Bayo, A. (författare)
- Univ Valparaiso, Inst Fis & Astron, Gran Bretana 1111, Valparaiso, Chile;Univ Valparaiso, Nucl Milenio Formac Planetaria, NPF, Valparaiso, Chile,University of Valparaíso
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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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- Bragaglia, A. (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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- Franciosini, E. (författare)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy
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- Gonneau, A. (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England,University of Cambridge
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- Heiter, Ulrike (författare)
- Uppsala University,Uppsala universitet,Observationell astrofysik
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- Hourihane, A. (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England,University of Cambridge
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- Jeffries, R. D. (författare)
- Keele Univ, Astrophys Grp, Keele ST5 5BG, Staffs, England,Keele University
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- Koposov, S. E. (författare)
- Carnegie Mellon Univ, McWilliams Ctr Cosmol, Dept Phys, 5000 Forbes Ave, Pittsburgh, PA 15213 USA,Carnegie Mellon University
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- Morbidelli, L. (författare)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy,INAF - Osservatorio Astrofisico di Arcetri
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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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- Sacco, G. (författare)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy
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- Sbordone, L. (författare)
- European Southern Observ, Alonso de Cordova 3107 Vitacura, Santiago, Chile,European Southern Observatory Santiago
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- Worley, C. (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England,University of Cambridge
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- Zaggia, S. (författare)
- INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy,INAF - Osservatorio Astronomico di Padova
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- Lewis, J. (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England,University of Cambridge
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(creator_code:org_t)
- 2020-01-31
- 2020
- Engelska.
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Ingår i: Astronomy and Astrophysics. - : EDP SCIENCES S A. - 0004-6361 .- 1432-0746. ; 634
- Relaterad länk:
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https://www.aanda.or...
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http://dx.doi.org/10...
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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: Open clusters are recognised as excellent tracers of Galactic thin-disc properties. At variance with intermediate-age and old open clusters, for which a significant number of studies is now available, clusters younger than less than or similar to 150 Myr have been mostly overlooked in terms of their chemical composition until recently (with few exceptions). On the other hand, previous investigations seem to indicate an anomalous behaviour of young clusters, which includes (but is not limited to) slightly sub-solar iron (Fe) abundances and extreme, unexpectedly high barium (Ba) enhancements.Aims: In a series of papers, we plan to expand our understanding of this topic and investigate whether these chemical peculiarities are instead related to abundance analysis techniques.Methods: We present a new determination of the atmospheric parameters for 23 dwarf stars observed by the Gaia-ESO survey in five young open clusters (tau < 150 Myr) and one star-forming region (NGC 2264). We exploit a new method based on titanium (Ti) lines to derive the spectroscopic surface gravity, and most importantly, the microturbulence parameter. A combination of Ti and Fe lines is used to obtain effective temperatures. We also infer the abundances of Fe I, Fe II, Tit, Tin,Na I, Mg I, Al I,Sit, Ca I, Cr I, and Ni I.Results: Our findings are in fair agreement with Gaia-ESO iDR5 results for effective temperatures and surface gravities, but suggest that for very young stars, the microturbulence parameter is over-estimated when Fe lines are employed. This affects the derived chemical composition and causes the metal content of very young clusters to be under-estimated.Conclusions: Our clusters display a metallicity [Fe/H] between +0.04 +/- 0.01 and +0.12 +/- 0.02; they are not more metal poor than the Sun. Although based on a relatively small sample size, our explorative study suggests that we may not need to call for ad hoc explanations to reconcile the chemical composition of young open clusters with Galactic chemical evolution models.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- stars: abundances
- stars: fundamental parameters
- stars: solar-type
- open clusters and associations: general
- Open clusters and associations: general
- Stars: abundances
- Stars: fundamental parameters
- Stars: solar-type
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Baratella, M.
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D'Orazi, V
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Carraro, G.
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Desidera, S.
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Randich, S.
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Magrini, L.
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visa fler...
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Adibekyan, V
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Smiljanic, R.
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Spina, L.
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Tsantaki, M.
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Tautvaisiene, G.
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Sousa, S. G.
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Jofre, P.
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Jimenez-Esteban, ...
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Delgado-Mena, E.
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Martell, S.
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Van der Swaelmen ...
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Roccatagliata, V
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Gilmore, G.
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Alfaro, E. J.
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Bayo, A.
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Bensby, T.
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Bragaglia, A.
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Franciosini, E.
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Gonneau, A.
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Heiter, Ulrike
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Hourihane, A.
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Jeffries, R. D.
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Koposov, S. E.
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Morbidelli, L.
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Prisinzano, L.
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Sacco, G.
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Sbordone, L.
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Worley, C.
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Zaggia, S.
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Lewis, J.
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