Abstract
With the advent of large astronomical surveys, the need of identification of the most interesting astrophysical object is required. In this work we focus on extracting red giant metal-poor stars from the LAMOST DR5. We then query the 5-D space coordinates from the Gaia DR2 to investigate their energy-action space. This sample will be used for studying the chemical and dynamical evolution of the early galactic phase. Also, identifying stars with kinematical similarities would enable us to trace the galactic assembly.
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