Cosmology

Cosmology is the study of the large scale structure of the Universe, as well as its dynamics. Our group has been involved in the study and development of cosmological models, in particular to explain the accelerated phases of the cosmological evolution, dubbed inflationary phases.

For our latest developments/activities in this area, please see the listing below.


Latest Cosmology Publications

A convenient gauge for virial identities in axial symmetry, J. M. S. Oliveira, A. M. Pombo; arXiv:2207.12451 [gr-qc].

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CDF II W-mass anomaly faces first-order electroweak phase transition, Andrea Addazi, Antonino Marciano, António P. Morais, Roman Pasechnik, Hao Yang; arXiv:2204.10315 [hep-ph].

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Gravitational-Wave Signatures of Chiral-Symmetric Technicolor, Hao Yang, Felipe F. Freitas, Antonino Marciano, António P. Morais, Roman Pasechnik, João Viana; arXiv:2204.00799 [hep-ph].

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Virial identities in relativistic gravity: 1D effective actions and the role of boundary terms, Carlos A. R. Herdeiro, João M. S. Oliveira, Alexandre M. Pombo, Eugen Radu; Phys. Rev. D 104 (2021) 104051, arXiv:2109.05027 [gr-qc].

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Impact of SM parameters and of the vacua of the Higgs potential in gravitational waves detection, Felipe F. Freitas, Gabriel Lourenço, António P. Morais, André Nunes, João Olívia, Roman Pasechnik, Rui Santos, João Viana; JCAP 03 (2022) 03, 046, arXiv:2108.12810 [hep-ph].

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Latest Cosmology News & Events

A waveform catalogue for Proca star collisions

The detection of gravitational waves has been one of the most exciting scientific developments of the XXIst century. These detections are theory-driven, they rely on the existence of waveform libraries, which have been constructed for binary black holes and neutron stars. Gr@v members have collaborated on the construction of the first waveform catalogue for exotic compact objects, an effort led by former Gr@v member Nicolas Sanchis Gual (now at the U. Valencia).

The fate of the light-ring instability

In the paper "The fate of the light-ring instability" Gr@v members P. Cunha, C. Herdeiro and E. Radu, together with former member, currently at the U. Valencia, N. Sanchis-Gual, have unveiled the mystery of the fate of a large class of horizonless ultracompact objects, that could be potential black hole foils.

 

 

A long standing intriguing possibility is if the astrophysical black hole candidates could be some other kind of mysterious objects but without event horizons, the defining property of black holes.