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Spectroscopic study of formation, evolution and interaction of M31 and M33 with star clusters

Published online by Cambridge University Press:  07 March 2016

Zhou Fan  and
Yanbin Yang
Zhou Fan
Affiliation:
Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang Dist., Beijing, China email: zfan@bao.ac.cn
Yanbin Yang
Affiliation:
GEPI, Observatoire de Paris, CNRS, 5 Place Jules Janssen, Meudon F92195, France
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Abstract

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The recent studies show that the formation and evolution process of the nearby galaxies are still unclear. By using the Canada France Hawaii Telescope (CFHT) 3.6m telescope, the PanDAS shows complicated substructures (dwarf satellite galaxies, halo globular clusters, extended clusters, star streams, etc.) in the halo of M31 to ~150 kpc from the center of galaxy and M31-M33 interaction has been studied. In our work, we would like to investigate formation, evolution and interaction of M31 and M33, which are the nearest two spiral galaxies in Local Group. The star cluster systems of the two galaxies are good tracers to study the dynamics of the substructures and the interaction. Since 2010, the Xinglong 2.16m, Lijiang 2.4m and MMT 6.5m telescopes have been used for our spectroscopic observations. The radial velocities and Lick absorption-line indices can thus be measured with the spectroscopy and then ages, metallicities and masses of the star clusters can be fitted with the simple stellar population models. These parameters could be used as the input physical parameters for numerical simulations of M31-M33 interaction.

Keywords

galaxies: individual (M31) – galaxies: individual (M33) – galaxies: star clusters – globular clusters: general – star clusters: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S312: Star Clusters and Black Holes in Galaxies across Cosmic Time , August 2014 , pp. 201 - 202
Copyright
Copyright © International Astronomical Union 2016 

References

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