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Summer Research Fellowship Programme of India's Science Academies

Metallicity Distribution of Open Star Clusters

Ananya Bandopadhyay

Department of Physics, Indian Institute of Science, Education and Research, Pune, Dr. Homi Bhaba Road, Pashan, Pune 411008.

Dr. Yogesh Chandra Joshi

Aryabhatta Research Institute of Observational Sciences (ARIES) Manora Peak, Nainital 263002, India

Abstract

Open clusters prove to be excellent tools to study the structure and evolution of the galactic disc. By studying the elemental abundances with varying parameters, we can gain insight into various aspects of the Galactic structure, such as star-formation activity, initial mass function, models of Galaxy evolution, etc. The advantage of studying open star clusters is that they span over a large age range - from a few Myrs to a few Gyrs - and therefore can be used to gain insight into the time evolution of the Galactic disc, which has significant influence on the study of the galactic structure (such as star formation activity, initial mass function, radial migration, gas flows, models of evolution of the galaxy, etc). In this project, we perform the statistical analysis of 335 star clusters, grouped according to their ages and on the basis of methods for determining metallicity. By observing the variation of metallicity in varying parameters, we attempt to learn more about the structure and evolution of the galaxy.

Keywords: Galactic structure, galaxy abundances, metallicity gradients, data, catalogue.

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