The Gaia-ESO Survey: Spectroscopic-asteroseismic analysis of K2 stars in Gaia-ESO The K2 Galactic Caps Project

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The Gaia-ESO Survey : Spectroscopic-asteroseismic analysis of K2 stars in Gaia-ESO The K2 Galactic Caps Project

Worley, C. C. (author): Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge

Jofré, P. (author): Univ Diego Portales, Nucleo Astron, Av Ejercito 441, Santiago, Chile.,Diego Portales University

Rendle, B. (author): Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England.,University of Birmingham

Miglio, A. (author): Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England.,University of Birmingham

Magrini, L. (author): INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri

Feuillet, D. (author): 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,Max Planck Institute for Astronomy

Gavel, Alvin (author): Uppsala University,Uppsala universitet,Observationell astrofysik

Smiljanic, R. (author): Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland.,INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.,Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences,INAF - Osservatorio Astrofisico di Arcetri

Lind, Karin (author): Uppsala University,Stockholm University,Uppsala universitet,Stockholms universitet,Institutionen för astronomi,Max-Planck Institut für Astronomie, Germany; Uppsala University, Sweden,Observationell astrofysik,Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany.;Stockholm Univ, Dept Astron, Roslagstullbacken 21, S-10691 Stockholm, Sweden.

Korn, Andreas, 1972- (author): Uppsala University,Uppsala universitet,Observationell astrofysik

Gilmore, G. (author): Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.,Univ Padua, Dipartimento Fis & Astron, Vicolo Osservatorio 3, I-35122 Padua, Italy.,University of Cambridge,INAF - Osservatorio Astrofisico di Arcetri,University of Padova

Randich, S. (author)

Hourihane, A. (author): Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge

Gonneau, A. (author): Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge

Francois, P. (author): Univ Paris Diderot, GEPI, Observ Paris, CNRS, 5 Pl Jules Janssen, F-92190 Meudon, France.,Paris Observatory

Lewis, J. (author): Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge

Sacco, G. (author)

Bragaglia, A. (author): INAF Osservatorio Astrofis & Sci Spazio Bologna, Via Gobetti 93-3, I-40129 Bologna, Italy.,INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Bologna

Heiter, Ulrike (author): Uppsala University,Uppsala universitet,Observationell astrofysik

Feltzing, S. (author): 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

Bensby, T. (author): 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

Irwin, M. (author): Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge

Solares, E. Gonzalez (author): Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge

Murphy, D. (author): Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge

Bayo, A. (author): Univ Valparaiso, Inst Fis & Astron, Fac Ciencias, Av Gran Bretana 1111, Valparaiso 5030, Chile.;Univ Valparaiso, Nucleo Milenio Formac Planetaria NPF, Av Gran Bretana 1111, Valparaiso, Chile.,University of Valparaíso

Sbordone, L. (author): European Southern Observ, Vitacura 3107, Santiago De Chi, Chile.,European Southern Observatory Santiago

Zwitter, T. (author): Univ Ljubljana, Fac Math & Phys, Jadranska 19, Ljubljana 1000, Slovenia.,University of Ljubljana

Lanzafame, A. C. (author): Univ Catania, Dipartimento Fis & Astron, Sez Astrofis, Via S Sofia 78, I-95123 Catania, Italy.,University of Catania

Walton, N. (author): Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge

Zaggia, S. (author): INAF Padova Observ, Vicolo Osservatorio 5, I-35122 Padua, Italy.,INAF - Osservatorio Astronomico di Padova

Alfaro, E. J. (author): CSIC, Inst Astrofis Andalucia, Granada 18080, Spain.,CSIC Instituto de Astrofísica de Andalucía (IAA)

Morbidelli, L. (author): INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri

Sousa, S. (author): Univ Porto, Inst Astrofis & Ciencias Espaco, CAUP, Rua Estrelas, P-4150762 Porto, Portugal.,University of Porto

Monaco, L. (author): Univ Andres Bello, Dept Ciencias Fis, Fernandez Concha 700, Santiago, Chile.,Andrés Bello National University

Carraro, G. (author)

Lardo, C. (author): Ecole Polytech Federate Lausanne EPFL, Lab Astrophys, Observ Sauverny, CH-1290 Versoix, Switzerland.,Swiss Federal Institute of Technology

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Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England University of Cambridge (creator_code:org_t)

2020-11-06
2020
English.
In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 643

Related links:: https://doi.org/10.1...; show more...; https://www.aanda.or...; http://dx.doi.org/10... (free); https://urn.kb.se/re...; https://doi.org/10.1...; https://urn.kb.se/re...; https://lup.lub.lu.s...; show less...

Journal article (peer-reviewed)

Abstract Subject headings

Context. The extensive stellar spectroscopic datasets that are available for studies in Galactic Archeaology thanks to, for example, the Gaia-ESO Survey, now benefit from having a significant number of targets that overlap with asteroseismology projects such as Kepler, K2, and CoRoT. Combining the measurements from spectroscopy and asteroseismology allows us to attain greater accuracy with regard to the stellar parameters needed to characterise the stellar populations of the Milky Way.Aims. The aim of this Gaia-ESO Survey special project is to produce a catalogue of self-consistent stellar parameters by combining measurements from high-resolution spectroscopy and precision asteroseismology.Methods. We carried out an iterative analysis of 90 K2@Gaia-ESO red giants. The spectroscopic values of Teff were used as input in the seismic analysis to obtain log g values. The seismic estimates of log g were then used to re-determine the spectroscopic values of Teff and [Fe/H]. Only one iteration was required to obtain parameters that are in good agreement for both methods and, thus, to obtain the final stellar parameters. A detailed analysis of outliers was carried out to ensure a robust determination of the parameters. The results were then combined with Gaia DR2 data to compare the seismic log g with a parallax-based log g and to investigate instances of variations in the velocity and possible binaries within the dataset.Results. This analysis produced a high-quality catalogue of stellar parameters for 90 red giant stars from K2@Gaia-ESO that were determined through iterations between spectroscopy and asteroseismology. We compared the seismic gravities with those based on Gaia parallaxes to find an offset which is similar to other studies that have used asteroseismology. Our catalogue also includes spectroscopic chemical abundances and radial velocities, as well as indicators for possible binary detections.

Subject headings

NATURVETENSKAP -- Fysik (hsv//swe)
NATURAL SCIENCES -- Physical Sciences (hsv//eng)
NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

Keyword

catalogs
stars: fundamental parameters
stars: abundances
techniques: spectroscopic
asteroseismology
Asteroseismology
Catalogs
Stars: abundances
Stars: fundamental parameters
Techniques: spectroscopic

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art (subject category)

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NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...

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By the university: Stockholm University; Uppsala University; Lund University

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