São Paulo Research Group meetings in Astro & Cosmo

Next meeting: August 29, 2025

São Paulo, Brazil

Venue: Instituto Principia

Zoom id: 862 0094 6662
Password: cosmo

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ICTP-SAIFR is promoting monthly one-day meetings of the São Paulo community working in the related areas of Cosmology/Astrophysics/Astroparticles/Gravity to be held at the Instituto Principia. The idea is to have a light schedule, with a couple of talks and plenty of time for discussion. The main purpose is to explore synergies of the different groups.
The activity will be transmitted online by Zoom.
Next Meetings:
TBA

If you want to receive mailings about the meetings, click HERE.

Organizers:

  • Raul Abramo (IFUSP)
  • Chee Sheng Fong (UFABC)
  • Rogério Rosenfeld (IFT-UNESP)
  • Riccardo Sturani (IFT-UNESP)

 

Announcement:

Invited Speakers

  • 11:00 Alexandre Le Tiec (IFT-UNESP — CNRS): What’s in a Name: the Anthropocene”
    Can we continue to sustain forms of social organization sufficiently stable and complex to guarantee the ongoing pursuit of the exploration of the Universe—and to do so in a manner that proves durable over time? Confronted with the exhaustion of fossil energy resources, the destabilization of the global climate, and the manifold devastations of ecological systems, the very possibility of the modern scientific enterprise is placed under profound scrutiny. Through an interdisciplinary investigation mobilizing an extensive corpus of knowledge from both the natural sciences and the humanities and social sciences, we shall endeavor to trace the genealogical roots of the Anthropocene.
  • 14:00 Fernanda Lima (IF-USP): Ultra-light dark matter and power spectra emulators
    The nature of dark matter constitutes one of the main open questions in contemporary physics. In cosmological scales, we have a remarkable success of the cold dark matter description in explaining precise observations. However, in scales below Mpc, the dark matter behavior is not precisely constrained. This motivates the study of models that have different phenomenologies in small scales, such as ultra-light dark matter. In this talk, I will briefly present this class of dark matter candidates and discuss the utility of building emulators to calculate its power spectra in the context of parameter inference.
  • 15:15 João Ferri (IF-USP): What can we gain from small scales in shear analysis? A comparison between Fourier and Real spaces.
    Abs: A known problem in cosmic shear two-point statistics is the apparent inconsistency between analyses done in harmonic/Fourier space (power spectrum) and real space (angular correlation). This arises from the fact that scale cuts in one space correspond to “soft” cuts in the other, as the relationship between these two spaces is given by Bessel functions. For the same reason, astrophysical effects that are compact in one space may not be in the other, which can lead to biased parameter estimation. I will present the consequences of pushing the boundaries of our analyses to smaller scales in both spaces, accounting for different models of Intrinsic Alignment and Baryonic Feedback in HSC Y3 data.

Previous Meetings

June 13, 2025
  • 10:00 Walter Riquelme (IFT-UNESP): Imprints of Large-Scale Structures in the Anisotropies of the Cosmological Gravitational Wave Background – Video
  • 11:15 Ricardo Medina (UFEI): Determining self-force corrections to the equation of the separatrix of a Schwarzschild black hole – Video
  • 14:00 Gustavo Figueiredo Severiano Alves (IF-USP): Chasing Serendipity: Tackling Transient Sources with Neutrino Telescopes – Video
May 9, 2025
      • 10:00 Pedro Bittar (USP): Baryogenesis just around the corner: Generating the matter asymmetry at or below the weak scale – Video
      • 11:15 Rodrigo Voivodic (Donostia Int. Physics Cent. San Sebastian & IFT-UNESP): Likelihoods – Video
      • 14:00 Gustavo Henrique dos Santos (UFABC): ACT Constraints on Low Scale Inflation and a Mechanism for Vector Dark Matter Production – Video
April 4, 2025

Photos

São Paulo Research Group meetings in Astro & Cosmo

Additional Information

How to reach the Principia Institute: The meeting will be held in the first-floor auditorium of the Science Center at Principia Institute located at Rua Pamplona, 145 near the Trianon-Masp metro station.