Rogério
Monteiro-Oliveira, Ph.D.
Academic Experience
Postdoc fellow
Institute of Astronomy and Astrophysics, Academia Sinica
Taipei, Taiwan
May/2021 - Mar/2025
Visiting professor
State University of Santa Cruz
Ilhéus-BA, Brazil
Sep/2020 - Sep/2021
Assistant professor
Institute of Astronomy, Geophysics and Atmospheric Sciences at the University of São Paulo
São Paulo-SP, Brazil
Mar/2020 - Sep/2020
Post-doctoral researcher
Institute of Astronomy, Geophysics and Atmospheric Sciences at the University of São Paulo
São Paulo-SP, Brazil
Jan/2018 - Dec/2020
Assistant professor
Astronomy Department / Physics Institute - Federal University of Rio Grande do Sul
Porto Alegre-RS, Brazil
Mar/2017 - Jan/2018
Post-doctoral researcher
Institute of Astronomy, Geophysics and Atmospheric Sciences at the University of São Paulo
São Paulo-SP, Brazil
Nov/2016 - Oct/2017
Languages
Portuguese (native)
English (B2 level)
Skills
R programing
IRAF
ALF
Data reduction (imaging and spectroscopy)
Outreach activities
Education
Ph.D. in Astrophysics
Institute of Astronomy, Geophysics and Atmospheric Sciences at the University of São Paulo
Advised by Prof Eduardo S. Cypriano
Nov/2011 - Oct/2016
According to the hierarchical scenario, galaxy clusters are the largest gravitationally bound structures in the Universe, formed through the merger of smaller subclusters along cosmic filaments. These mergers are the most energetic events since the Big Bang and offer a unique laboratory to study the three main components of clusters: dark matter, intra-cluster gas, and galaxies. In my PhD thesis, I studied three merging systems—Abell 1758, Abell 2034, and Abell 3376—whose collisions occur close to the plane of the sky. Using optical imaging and spectroscopy, I applied weak lensing to map mass distributions and derived dynamical properties such as velocity dispersions and line-of-sight separations. These data allowed us to estimate individual cluster masses and characterize their merger stages through two-body dynamical modeling. We also assessed the impact of merging on galaxy velocity dispersions and placed (albeit weak) upper limits on the dark matter self-interaction cross-section.
M.Sc. in Astrophysics
Institute of Astronomy, Geophysics and Atmospheric Sciences at the University of São Paulo
Advised by Prof Eduardo S. Cypriano
Mar/2009 - Sep/2011
We investigated two galaxy clusters, Abell 1758 (z = 0.28) and Abell 2034 (z = 0.11), with strong observational evidence of recent mergers between substructures. Our goal was to reconstruct the mass distribution, dominated by dark matter, and compare it with the galaxy distribution and intra-cluster gas traced by X-ray emission. We performed data reduction, calibration, and photometric analysis of Subaru multi-band (B, R, z′) imaging, and used weak lensing to map the mass. Our results revealed spatial offsets between dark matter and gas, particularly in the northern structure of A2034 and in A1758N, suggesting ongoing interactions akin to those seen in the Bullet Cluster.
B.Sc. in Physics
Institute of Physics at the University of São Paulo
Feb/2002 - Aug/2008