Correlations between Kinematics and Metallicity in the Galactic Bulge: A Review

2016/01/01 by Carine Babusiaux
Physics and Astronomy · Social Sciences · #Astronomy and Astrophysical Research #Bulge #Educational Leadership and Practices #Galaxy #Kinematics #Metallicity #Milky Way #Rotation (mathematics) #Stars #Stellar kinematics #Stellar, planetary, and galactic studies #astro-ph.GA

paper · pdf · doi:10.1017/pasa.2016.1

Accepted for publication in PASA

openalex publication_date 2016/01/01 · arxiv created 2016/01/28 · openalex created_date 2016/06/24 · arxiv updated 2016/07/06 · openalex updated_date 2026/08/05

Abstract

Abstract Recent large-scale surveys of galactic bulge stars allowed to build a detailed map of the bulge kinematics. The bulge exhibits cylindrical rotation consistent with a disky origin which evolved through bar-driven secular evolution. However, correlations between metallicity and kinematics complicate this picture. In particular a metal-poor component with distinct kinematic signatures has been detected. Its origin, density profile and link with the other Milky Way stellar populations are currently still poorly constrained.

Citations

• Stellar Proper Motions in the Galactic Bulge from DeepHubble Space TelescopeACS WFC Photometry
• On the correlation between metallicity and the X-shaped morphology of the Milky Way bulge
• ALPHA ENHANCEMENT AND THE METALLICITY DISTRIBUTION FUNCTION OF PLAUT’S WINDOW
• The Optical Gravitational Lensing Experiment: catalogue of stellar proper motions in the OGLE-II Galactic bulge fields
• Evidence of a Metal-rich Galactic Bar from the Vertex Deviation of the Velocity Ellipsoid