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| Paper: |
Radial Velocity and Abundance Properties of Five Open
Clusters Based on SDSS DR7 |
| Volume: |
451, 9th Pacific Rim Conference on Stellar Astrophysics |
| Page: |
303 |
| Authors: |
Chen, L.; Gao, X. H. |
| Abstract: |
We present metallicities and radial velocities for five old
open clusters (NGC 6791, NGC 2420, NGC 2682, NGC 2158, NGC 7789)
using data from the SDSS DR7. The radial velocities are used to
calculate cluster membership probabilities for stars in each
cluster region. NGC 6791, NGC 2420, NGC 2682, NGC 2158 and NGC
7789 are found to have a mean metallicity [Fe/H]=
+0.08±0.09, –0.38±0.11, –0.08±0.04, –0.41±0.14 and
–0.18±0.13 dex(s.d.), respectively. The mean radial velocities
for these clusters are Vr = -45.9 ±0.2, +76.1±0.2,
+35.0±0.2, +26.9±0.2 and –48.2±0.2
km s–1, respectively. We have compared our results
with the values from literatures, found that our metallicity of
NGC 6791 is significantly underestimated (by about 0.3 dex) and
our radial velocities of the open clusters agree well with the
values derived based on high-resolution spectroscopy. |
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