Astronomy and Astrophysics, volume 498, 949-960 (2009/5-2)
Catalogues of radial and rotational velocities of 1253 F-K dwarfs in 13 nearby open clusters.
MERMILLIOD J.-C., MAYOR M. and UDRY S.
Abstract (from CDS):
We conducted a long-term monitoring of solar-type dwarfs in 13 nearby open clusters, d<500pc, over 19-years, but most individual radial velocities were never published, apart from a small number of spectroscopic binaries. Our program was designed to study membership and duplicity, and to search for new cluster members. We obtained 6070 radial velocities during 19-years of observations at the Haute-Provence Observatory (France) and 1130 during 13-years at ESO La Silla (Chile) for 1253 stars in the field of 13 open clusters. The zeropoint of the CORAVEL radial velocity system was improved and the new values supersede those published previously. The membership and binarity of solar-type stars in NGC 1976 (Orion), IC 2602, NGC 7092, and NGC 2682 are briefly discussed. For the entire sample, we confirmed the membership of 894 stars and discovered 150 new spectroscopic binaries among them. Added to those already known in the Hyades and Coma Berenices, the number of member spectroscopic binaries is 188. The overall binary frequency is 30% (188/618) for stars with at least 2 measurements. Since no spectroscopic binaries were found among its 26 members, IC 2602 may however represent an exception. New orbital elements were computed with the updated values of the radial velocities for 66 systems, representing 55 members and 11 non-members. This paper is the final report from our team of CORAVEL radial velocities of solar-type dwarfs in nearby open clusters. All CORAVEL observations for dwarfs and red giants in open clusters are now available in electronic form.
galaxy: open clusters and associations: general - stars: late-type - stars: binaries: spectroscopic - techniques: radial velocities
VizieR on-line data:
<Available at CDS (J/A+A/498/949): table8.dat table10.dat table11.dat>
Tables 4, 11: [MMU2009] NGC 6475 C NNNN N=10 among (Nos 1018-1886). Tables 5, 11: [MMU2009] IC 2602 SR N (Nos SR 1- SR 5).
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