The Gaia -ESO survey: the inner disk intermediate-age open cluster NGC 6802
- Creators
- Tang, B.
- Geisler, D.
- Friel, E.
- Villanova, S.
- Smiljanic, R.
- Casey, Romain
- Randich, S.
- Magrini, L.
- San Roman, I.
- Muñoz, C.
- Cohen, E.
- Mauro, F.
- Bragaglia, A.
- Donati, P.
- Tautvaišien*error*ė, G.
- Drazdauskas, A.
- Ženovienė, R.
- Snaith, O.
- Sousa, S.
- Adibekyan, V.
- Costado, M.
- Blanco-Cuaresma, S.
- Jiménez-Esteban, F.
- Carraro, G.
- Zwitter, T.
- François, P.
- Jofre, P.
- Sordo, R.
- Gilmore, G.
- Flaccomio, E.
- Koposov, S.
- Korn, A.
- Lanzafame, A.
- Pancino, E.
- Bayo, A.
- Damiani, F.
- Franciosini, E.
- Hourihane, A.
- Lardo, C.
- Lewis, J.
- Monaco, L.
- Morbidelli, L.
- Prisinzano, L.
- Sacco, G.
- Worley, C.
- Zaggia, S.
- Others:
- Régulations métaboliques, nutrition et diabètes - UM55 (RMND UM55) ; Institut National de la Recherche Agronomique (INRA)-Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon) ; Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)
- Departamento de Fisica Teorica C-XI (FTUAM) ; Universidad Autónoma de Madrid (UAM)
- INAF - Osservatorio Astronomico di Bologna (OABO) ; Istituto Nazionale di Astrofisica (INAF)
- Institut national de recherche et de sécurité (Vandoeuvre lès Nancy) (INRS ( Vandoeuvre lès Nancy))
- Korea Institute for Advanced Study (KIAS)
- Centro de Astrofísica da Universidade do Porto (CAUP) ; Universidade do Porto = University of Porto
- University of Ljubljana
- Galaxies, Etoiles, Physique, Instrumentation (GEPI) ; Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
- INAF - Osservatorio Astronomico di Padova (OAPD) ; Istituto Nazionale di Astrofisica (INAF)
- Department of Astronomy and Space Physics [Uppsala] ; Uppsala University
- INAF - Osservatorio Astrofisico di Catania (OACT) ; Istituto Nazionale di Astrofisica (INAF)
- Università degli studi di Torino = University of Turin (UNITO)
- Ecole Polytechnique Fédérale de Lausanne (EPFL)
- Istituto Nazionale di Fisica Nucleare, Sezione di Milano (INFN) ; Istituto Nazionale di Fisica Nucleare (INFN)
- Joseph Louis LAGRANGE (LAGRANGE) ; Université Nice Sophia Antipolis (1965 - 2019) (UNS) ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)
Description
Milky Way open clusters are very diverse in terms of age, chemical composition, and kinematic properties. Intermediate-age and old open clusters are less common, and it is even harder to find them inside the solar Galactocentric radius, due to the high mortality rate and strong extinction inside this region. NGC 6802 is one of the inner disk open clusters (IOCs) observed by the Gaia-ESO survey (GES). This cluster is an important target for calibrating the abundances derived in the survey due to the kinematic and chemical homogeneity of the members in open clusters. Using the measurements from Gaia-ESO internal data release 4 (iDR4), we identify 95 main-sequence dwarfs as cluster members from the GIRAFFE target list, and eight giants as cluster members from the UVES target list. The dwarf cluster members have a median radial velocity of 13.6 ± 1.9 km s-1, while the giant cluster members have a median radial velocity of 12.0 ± 0.9 km s-1 and a median [Fe/H] of 0.10 ± 0.02 dex. The color-magnitude diagram of these cluster members suggests an age of 0.9 ± 0.1 Gyr, with (m-M)0 = 11.4 and E(B-V) = 0.86. We perform the first detailed chemical abundance analysis of NGC 6802, including 27 elemental species. To gain a more general picture about IOCs, the measurements of NGC 6802 are compared with those of other IOCs previously studied by GES, that is, NGC 4815, Trumpler 20, NGC 6705, and Berkeley 81. NGC 6802 shows similar C, N, Na, and Al abundances as other IOCs. These elements are compared with nucleosynthetic models as a function of cluster turn-off mass. The alpha, iron-peak, and neutron-capture elements are also explored in a self-consistent way.
Abstract
International audience
Additional details
- URL
- https://hal.archives-ouvertes.fr/hal-02161360
- URN
- urn:oai:HAL:hal-02161360v1
- Origin repository
- UNICA