Astrophysics News & Events

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Cosmology from galaxy phase-space information and a bit of halo-galaxy connection

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Speaker
Natali de Santi (Flatiron Institute and University of Sao Paulo)
Event date
Venue
Online (only)
Event type

In this talk, I will give an overview of how to do field-level likelihood-free inference with galaxy catalogs.
More specifically, only using phase-space information, I will show how to convert galaxy catalogs into graphs.
I will explain how to use graph neural networks, associated with moment neural networks, to constrain Omega matter.

Maurício Richartz visit

Prof. Maurício Richartz, from ABC Federal University, State of São Paulo, Brazil, visited Gr@v in March-April 2023, to discuss analogue models of gravity and other topics. Thank you for your visit Maurício and see you soon!

Prospects for multi-probe cosmology as gravity and inflation probes

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Speaker
Jose Fonseca (Instituto de Astrofísica e Ciências do Espaço)
Event date
Venue
Hybrid Sala Sousa Pinto (Math dpt) and Zoom
Event type

The next decade will see an overwhelming number of cosmological surveys coming online. The Square Kilometre Array Observatory (SKAO) will, among several other science cases, map the distribution of cold neutral Hydrogen in the Universe using its spin-flip transition emission line at rest of 21cm or 1.4GHz and a novel technique called Intensity Mapping (IM).

Meeting with a scientist

 

Gr@v member Miguel Zilhão was the guest for the activity "Meeting with a scientist", organized by the outreach centre Fábrica.The audience was a group of 4th grade students from the Primary Schools of Glória and São Jacinto. They were all very curious about the Universe and asked a lot of interesting questions.