Institute of Cosmology and Gravitation

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THEORETICAL COSMOLOGY

The standard model of cosmology is based on an expanding homogeneous and isotropic model of the Universe with inhomogeneities which grow due to gravitational instabilities.

They imprint anisotropies in the cosmic microwave background (CMB) and give rise to the large-scale structure (LSS) of our Universe. The nature of the primordial perturbations in the CMB and their evolution into LSS reveals both the physical origin of the perturbations in the very early universe, and the nature of dark energy and gravity at work in the universe at late times.

Current observations have given strong support to the notion that the expansion of the universe is accelerated at very early times and again at the recent times, but major challenges remain to identify the mechanisms responsible for acceleration in such different physical regimes.

Our theoretical cosmology research encompasses both the very early and the late universe, collected in three inter-locking themes:

  • Very Early Universe
  • Late-time Acceleration
  • Relativistic Cosmology

We have weekly Theoretical Cosmology Meetings on Wednesdays from 1-2pm.

ICG faculty researching theoretical cosmology include

Marco Bruni
Rob Crittenden
Kazuya Koyama

Roy Maartens
David Wands

 

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Latest News

  • SEPnet Public Engagement Awards 2021
  • Virtual Pompey Stargazing 2021
  • Project to help vision impaired people engage with astronomy wins award
  • Bumper crop of black holes in new gravitational wave paper
  • Major EU grant to unravel the mysteries of the Universe

Coming up

  • Lukas Witkowski (IAP) on April 21, 2021 1:00 pm
  • Laura Wolz (Manchester), TBA on April 22, 2021 2:30 pm
  • Unusually massive stars in galaxy centres (Guinevere Kauffmann, MPA) on April 29, 2021 12:00 pm
  • Diego Blas (King’s College London), TBA on April 29, 2021 2:30 pm
  • Observational Cosmology on May 3, 2021 2:00 pm

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