TL;DR
This paper reviews current knowledge of the Galactic bulge's structure and stellar population, emphasizing recent chemical abundance measurements to inform galaxy formation models.
Contribution
It provides a comprehensive overview of the Galactic bulge's properties, highlighting recent advances in chemical abundance data for hundreds of stars.
Findings
Detailed chemical abundance patterns of bulge stars
Insights into the formation history of the Galactic bulge
Constraints on galaxy formation models
Abstract
The Galactic bulge is the central spheroid of our Galaxy, containing about one quarter of the total stellar mass of the Milky Way (M_bulge=1.8x10^10 M_sun; Sofue, Honma & Omodaka 2009). Being older than the disk, it is the first massive component of the Galaxy to have collapsed into stars. Understanding its structure, and the properties of its stellar population, is therefore of great relevance for galaxy formation models. I will review our current knowledge of the bulge properties, with special emphasis on chemical abundances, recently measured for several hundred stars.
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