A benchmark bulge sample in the Gaia era

• Grant number: 25/01915-0
• Support Opportunities: Research Grants - Visiting Researcher Grant - International
• Start date: August 01, 2025
• End date: January 31, 2026
• Field of knowledge: Physical Sciences and Mathematics - Astronomy - Stellar Astrophysics
• Principal Investigator: Beatriz Leonor Silveira Barbuy
• Grantee: Beatriz Leonor Silveira Barbuy
• Visiting researcher: Cristina Chiappini Moraes Leite
• Visiting researcher institution: Leibniz-Institut Für Astrophysik Potsdam/Aip, Germany
• Host Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 20/15245-2 - The multi-object spectrograph (MOSAIC) for the extremely large telescope: spectroscopy of stellar populations in the milky way and external galaxies, AP.ESP

Abstract

The Galactic bulge is the most complex region of the Milky Way. Over the past 20 years, we have been analyzing various samples, focusing par ticularly on stellar chemical abundances and kinematical properties. For a comprehensive analysis of these samples, an important new element is to complementour results with the proper motion data from the Gaia mission, computing precise distances with theStarHorse code, and with that orbital parameters for all the sampe. This is the primary objective of our work. We will compile the different samples we've been studying and create a catalog that includes all abundance and kinematic properties. This alone will be a significant task. Using this catalog, we will be able to compute stellar orbits and, ultimately, characterize the distinct stellar populations present in the Galactic bulge, with a particular focus on the most primordial one, which is of the greatest interest. (AU)