Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...267...75f&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 267, no. 1, p. 75-91.
Astronomy and Astrophysics
Astrophysics
255
Galactic Structure, Metallicity, Open Clusters, Radial Velocity, Abundance, Milky Way Galaxy
Scientific paper
Medium resolution spectra of giant stars in 24 open clusters with ages greater than about 1 Gyr have been obtained and analyzed to provide radial velocities accurate to 10-15 km/s and (Fe/H) metallicities accurate to 0.15 dex. The radial velocities of the older cluster systems are consistent with those expected from the reflex of solar motion and simple Galactic rotation. The cluster kinematics suggest strongly that they are drawn from the old thin disk stellar population. An abundance gradient in the Galactic disk of -0.09 +/- 0.02 dex/kpc is found. This gradient is in good agreement with that found for samples of younger open clusters, suggesting that there has been little change in the Galactic radial abundance gradient over time. The cluster sample shows no correlation between age and metallicity, regardless of Galactocentric radius. The clusters show an unexpected correlation between the Mg line strength and age of the cluster at a fixed metallicity. Possible reasons for this are discussed.
Friel Eileen D.
Janes Kenneth A.
No associations
LandOfFree
Metallicities and radial velocities of old open clusters does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Metallicities and radial velocities of old open clusters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metallicities and radial velocities of old open clusters will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1771465