Bibcode
Casamiquela, L.; Carrera, R.; Jordi, C.; Balaguer-Núñez, L.; Pancino, E.; Hidalgo, S. L.; Martínez-Vázquez, C. E.; Murabito, S.; del Pino, A.; Aparicio, A.; Blanco-Cuaresma, S.; Gallart, C.
Referencia bibliográfica
Monthly Notices of the Royal Astronomical Society, Volume 458, Issue 3, p.3150-3167
Fecha de publicación:
5
2016
Número de citas
41
Número de citas referidas
40
Descripción
Open clusters (OCs) are crucial for studying the formation and evolution
of the Galactic disc. However, the lack of a large number of OCs
analysed homogeneously hampers the investigations about chemical
patterns and the existence of Galactocentric radial and vertical
gradients, or an age-metallicity relation. To overcome this, we have
designed the Open Cluster Chemical Abundances from Spanish Observatories
(OCCASO) survey. We aim to provide homogeneous radial velocities,
physical parameters and individual chemical abundances of six or more
red clump stars for a sample of 25 old and intermediate-age OCs visible
from the Northern hemisphere. To do so, we use high-resolution
spectroscopic facilities (R ≥ 62 000) available at Spanish
observatories. We present the motivation, design and current status of
the survey, together with the first data release of radial velocities
for 77 stars in 12 OCs, which represents about 50 per cent of the
survey. We include clusters never studied with high-resolution
spectroscopy before (NGC 1907, NGC 6991, NGC 7762), and clusters in
common with other large spectroscopic surveys like the Gaia-ESO Survey
(NGC 6705) and Apache Point Observatory Galactic Evolution Experiment
(NGC 2682 and NGC 6819). We perform internal comparisons between
instruments to evaluate and correct internal systematics of the results,
and compare our radial velocities with previous determinations in the
literature, when available. Finally, radial velocities for each cluster
are used to perform a preliminary kinematic study in relation with the
Galactic disc.