Gr@v in EREP 2026
Member of Gr@v H. Olivares participated at the Spanish and Portuguese Relativity Meeting 2026, held in Murcia, Spain, to deliver an invited talk on simulating and observing black hole mimickers.
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
Gravitational waves from warm inflation in the weak dissipative regime, O. Luongo, T. Mengoni, P. M. Sá; Phys. Dark Univ. 52 (2026) 102317; arXiv:2603.07662 [gr-qc].
Publication type
Regular Articles
Phantom cosmology with arbitrary potential: New accelerating scaling attractors, S. Halder, S. Pan, P. M. Sá, T. Saha; Phys. Lett. B 873 (2026) 140212, arXiv:2510.17765 [gr-qc].
Publication type
Regular Articles
Gravitational waves from two scalar fields unifying the dark sector with inflation, O. Luongo, T. Mengoni, P. M. Sá; Phys. Rev. D 113 (2026) 023541, arXiv:2509.21200 [gr-qc]
Publication type
Regular Articles
Gravitational echoes of lepton number symmetry breaking with light and ultralight Majorons, Andrea Addazi, Antonino Marciano, António P. Morais, Roman Pasechnik, João Viana, Hao Yang; JCAP 09 (2023) 026, 2304.02399 [hep-ph].
Publication type
Regular Articles
Gravitational waves from a scotogenic two-loop neutrino mass model, Cesar Bonilla, A. E. Carcamo Hernandez, João Gonçalves, Vishnudath K. N., António P. Morais, Roman Pasechnik; Phys.Rev.D 109 (2024) 9, 095022, 2305.01964 [hep-ph]
Publication type
Regular Articles
Latest Cosmology News & Events
Farewell to Etevaldo and visit of Hryhorii Ovcharenko
We got together on May 20th 2026 at Etevaldo's favourite restaurant in Aveiro (O Telheiro), to celebrate his 4.5 years in Gr@v. In the same day we had an excellent seminar from Hryhorii Ovcharenko, visiting from Prague. Etevaldo is now starting a post-doctoral position in Brazil. Many thanks, Etevaldo, for being with us. See you soon!
Dynamics and perturbations of Geometric Inflation assisted by a scalar field in the early Universe
Speaker
Luciano Navarro (Universidad de Valencia, Department of Theoretical Physics)
Event date
Venue
Hybrid: Sala Sousa Pinto and Teams
Event Website
Event type
Geometric Cosmology—and in particular Geometric Inflation (GI)—provides a higher-curvature mechanism capable of producing an accelerated expansion in the early Universe without invoking an inflaton in its minimal realization.
Celebrating Etevaldo's thesis with guests
In early May 2026 we received the visits of our collaborators Nico Sanchis Gual, Isa Cordero, Gabriele Palloni, Claudio Lazarte (Valencia, Spain), members of the NewFunFiCO network, as well as Carolina Benone (UFPA, Brazil) and Carlos Joaquin (UNAM, Mexico), who joined us to celebrate the successful Ph.D. exam of Etevaldo Costa.
Etevaldo Costa defendes his PhD thesis
Etevaldo Costa successfully defended his Ph.D. thesis with title "Bosonic exotic compact objects: construction and physical properties". The thesis was supervised by C. Herdeiro and E. Radu and the committee included Eric Gourgoulhon, Daniela Doneva and Carolina Benone as examiners. Congratulations Etevaldo!