Online Seminar “Probing the primordial Universe with 21cm and galaxy surveys”

Star-UBB Seminar Series:- Probing the primordial Universe with 21cm and galaxy surveys

The Square Kilometre Array Mid-Frequency radio telescope array is being built in South Africa, with early observations by the precursor Meerkat national park Karoo Array Telescope(MeerKAT) array already underway. At the same time various new optical / infrared telescopes have started, or will soon start, observing the cosmos. Next-generation surveys of the matter distribution will not only provide a major advance in precision on the standard cosmological parameters - they will also take the first steps beyond the Planck Cosmic Microwave Background(CMB) telescope in probing the primordial Universe. In particular, 21cm and galaxy surveys will be able to constrain the level of primordial non-Gaussianity at similar precision to Planck, but in a completely different way. By combining the results from different surveys, the aim will be to improve on Planck constraints and thus advance our understanding of the very early Universe.

時間:2024.05.09(四) 16:00~17:30
頻道:Zoom ID:853-7454-4159 ←
講者:Prof. Roy Maartens (Department of Physics and Astronomy, University of the Western Cape, Cape Town, South Africa)


Scientific and Technological Advanced Research- Babeș-Bolyai University(Star-UBB) Seminar Series in Gravitation, Cosmology and Astrophysics

Presently a period of rapid and intense change are being witnessed in our understanding of the gravitational force, at a rate that is quickly increasing since the important observational discoveries of the late 1990s. With the advent of new observational techniques, the emergence of important cosmological and astrophysical paradigms can be seen that lead to a deep change in our understanding of the Universe. Astronomical observations strongly suggest that at large scales the force of gravity may not behave according to standard general relativity, and that a generalization of the gravitational action, either at the geometric level, or at the matter level, may be required for a full understanding of the gravitational interaction.

The goal of the present seminar is to bring Theoretical Gravitational Physics closer to the observations and experiments, and to discuss current topics in general relativity, high-energy physics, astrophysics and cosmology.


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