Hostname: page-component-7c8c6479df-7qhmt Total loading time: 0 Render date: 2024-03-29T13:41:01.770Z Has data issue: false hasContentIssue false

[Si/Ti] elemental ratios in 9 old halo globular clusters

Published online by Cambridge University Press:  23 December 2005

Jae-Woo Lee
Affiliation:
Astrophysical Research Center for the Structure and Evolution of the Cosmos, Department of Astronomy and Space Science, Sejong University, 98 Gunja-Dong, Gwangjin-Gu, Seoul, 143-747, Korea email: jaewoolee@sejong.ac.kr
Bruce W. Carney
Affiliation:
Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599-3255, USA email: bruce@physics.unc.edu
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We present elemental abundance ratios for red giant stars in 9 old halo globular clusters based on the homogeneous data sample and analysis method. Our result suggests that [Si/Ti] ratios in old globular clusters decrease with Galactocentric distances, confirming the previous result by Lee & Carney (2002). We propose that contributions from different masses of the Type II suprenovae progenitors that enriched proto-globular clusters' clouds are responsible for this gradient.

Type
Contributed Papers
Copyright
© 2005 International Astronomical Union