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Galactic Metallicity Distribution from Open Clusters

Published online by Cambridge University Press:  26 May 2016

L. Chen ,
J. L. Hou  and
J. J. Wang
L. Chen
Affiliation:
Shanghai Astronomical Observatory, CAS, Shanghai 200030, China
J. L. Hou
Affiliation:
Shanghai Astronomical Observatory, CAS, Shanghai 200030, China
J. J. Wang
Affiliation:
Shanghai Astronomical Observatory, CAS, Shanghai 200030, China

Abstract

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We have compiled two new Galactic open cluster catalogues. The first one has 119 objects with age, distance and metallicity data, while the second one has 144 objects with both absolute proper motion and radial velocity data, of which 45 clusters also with metallicity data available. An iron radial gradient of about −0.063±0.008 dex kpc−1 is obtained from our sample. By dividing clusters into age groups, we show that iron gradient was steeper in the past. A disk age-metallicity relation could very probably exist based on the current sample.

Type
Part 2. Origin
Information
Symposium - International Astronomical Union , Volume 217: Recycling Intergalactic and Interslettar Matter , 2004 , pp. 194 - 195
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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