On the Galactic Disk Metallicity Distribution from Open Clusters. I. New Catalogs and Abundance Gradient

Citations Over TimeTop 10% of 2003 papers

Abstract

In this paper we have compiled two new open cluster catalogues. In the first one, there are 119 objects with ages, distances and metallicities available, while in the second one, 144 objects have both absolute proper motion and radial velocity data, of which 45 clusters also with metallicity data available. Taking advantages of the large number of objects included in our sample, we present an iron radial gradient of about -0.063$\pm$0.008 dex/kpc from the first sample. By dividing clusters into age groups, we show that iron gradient was steeper in the past, which is consistent with the recent result from Galactic planetary nebulae data, and also consistent with the inside-out galactic disk formation scenarios. Based on the cluster sample, we also discussed the metallicity distribution, cluster kinematics and space distribution. A disk age-metallicity relation could be implied from those properties, although we could not give conclusive result from the age metallicity diagram based on the current sample. More observations are needed for metal poor clusters.

Related Papers

• → Vertical Structure of the Milky Way Disk with Gaia DR3(2023)19 cited
• → The Study of Galactic Disk Kinematics with SCUSS and SDSS Data(2018)9 cited
• → Cu and Zn in Thick-Disk and Thin-Disk Stars(2006)5 cited
• → The Nature and Age of the Galactic Thick Disk(1989)
• → The radial extent of the Galactic thick disk(2016)