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Division seminars
The Expanding Universe: Age, Tensions, and the Search for New Physics
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Europe/Prague
Description
Abstract:
The expansion rate of the Universe, quantified by the Hubble constant H0, is one of the most fundamental parameters in cosmology. Yet, despite an era of increasingly precise observations, different methods for measuring H0 continue to yield results that are difficult to reconcile within the standard cosmological model. Moreover, recent observations from the Dark Energy Spectroscopic Instrument (DESI) have provided intriguing hints that the accelerated expansion of the Universe may not be fully described by a cosmological constant, raising renewed questions about the validity of the ΛCDM paradigm and the physics driving cosmic acceleration. In this talk, I will review how the Hubble constant and the age of the Universe are measured, highlighting both the observational techniques and the assumptions that underlie their interpretation. I will discuss the current status of the Hubble tension, its connection to the broader framework of the ΛCDM model, and the extent to which current observational anomalies may point to unresolved systematic effects or to new physics beyond the standard model of cosmology.
The seminar will be held in the Dvořák hall, FZU, Pod Vodárenskou věží 1, Prague.
Location: https://goo.gl/maps/wEf7PsiLimSXMZhE9
The seminar will be also available via ZOOM video conference system:
Meeting ID: 674 9629 6646
Passcode: 575511
or join meeting via direct ZOOM link
Organised by
Jiří Hejbal and Roman Lysák