A RAVE investigation on Galactic open clusters

I. Radial velocities and metallicities^⋆

¹ Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482 Potsdam, Germany
e-mail: cconrad@aip.de
² Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg, Mönchhofstraße 12−14, 69120 Heidelberg, Germany
³ Main Astronomical Observatory, 27 Academica Zabolotnogo Str., 03680 Kiev, Ukraine
⁴ Institute of Astronomy, Russian Acad. Sci., 48 Pyatnitskaya Str., 109017 Moscow, Russia
⁵ Institute of Astronomy, Cambridge University, Madingley Road, Cambridge CB3 0HA, UK
⁶ Observatoire astronomique de Strasbourg, Université de Strasbourg, CNRS, UMR 7550, 11 rue de l’Université, 67000 Strasbourg, France
⁷ INAF Astronomical Observatory of Padova, 36012 Asiago (VI), Italy
⁸ Dept. of Astronomy and Astrophysics, Villanova University, 800 E, Lancaster Ave, Villanova, PA 19085, USA
⁹ Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Slovenia
¹⁰ Center of excellence Space-SI, Askerceva 12, 1000 Ljubljana, Slovenia
¹¹ Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking, RH5 6NT, UK
¹² Research School of Astronomy and Astrophysics, Australian National University, Cotter Rd., Weston, ACT 2611, Australia
¹³ Department of Physics and Astronomy, University of Victoria, Victoria, BC, V8P5C2, Canada
¹⁴ Department of Physics and Astronomy, Macquarie University, Sydney, NSW 2109, Australia
¹⁵ Research Centre for Astronomy, Astrophysics and Astrophotonics, Macquarie University, NSW 2109 Sydney, Australia
¹⁶ Australian Astronomical Observatory, PO Box 296, NSW 1710 Epping, Australia
¹⁷ Australian Astronomical Observatory, 105 Delhi Road, PO Box 915, NSW 1670 North Ryde, Australia
¹⁸ Jeremiah Horrocks Institute, University of Central Lancashire, Preston, PR1 2HE, UK
¹⁹ Johns Hopkins University, 3400 N Charles Street, Baltimore, MD 21218, USA
²⁰ Sydney Institute for Astronomy, School of Physics A28, University of Sydney, NSW 2006 Sydney, Australia
²¹ Department of Physics and Astronomy, Padova University, Vicolo dell’Osservatorio 2, 35122 Padova, Italy

Received: 12 June 2013
Accepted: 21 August 2013

Abstract

Context. Galactic open clusters (OCs) mainly belong to the young stellar population in the Milky Way disk, but are there groups and complexes of OCs that possibly define an additional level in hierarchical star formation? Current compilations are too incomplete to address this question, especially regarding radial velocities (RVs) and metallicities ([M/H]).

Aims. Here we provide and discuss newly obtained RV and [M/H] data, which will enable us to reinvestigate potential groupings of open clusters and associations.

Methods. We extracted additional RVs and [M/H] from the RAdial Velocity Experiment (RAVE) via a cross-match with the Catalogue of Stars in Open Cluster Areas (CSOCA). For the identified OCs in RAVE we derived and from a cleaned working sample and compared the results with previous findings.

Results. Although our RAVE sample does not show the same accuracy as the entire survey, we were able to derive reliable for 110 Galactic open clusters. For 37 OCs we publish for the first time. Moreover, we determined for 81 open clusters, extending the number of OCs with by 69.