Abstract:The structure and kinematics of the old component of the Galactic bulge are still a matter of debate. It
is clear that the bulk of the bulge as traced by red clump stars includes two main components, which are usually
identified as the metal-rich and metal-poor components. They have different shapes, kinematics, mean metallicities, and alpha-element abundances. It is our current understanding that they are associated
with a bar and a spheroid, respectively. On the other hand, RR Lyrae variables trace the o… Show more
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