Strong Gravity News & Events

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Visit to Belém do Pará, Brazil

Gra@v members C. Herdeiro and E. Radu, together with Nuno Santos from IST-Lisbon, visited Universidade Federal do Pará (UFPa), Brazil, in Amazonia, during November 2019, within the Marie Curie RISE FunFiCO partnership. In the photon in the river Guamá, with Carolina Benone, a former UFPa/Aveiro PhD student, now staff at UFPa.

Gr@v students visit Japan

Gr@v Ph.D. students Alexandre Pombo, João Oliveira and Jorge Delgado visited Kindai University, Japan as members of the StronGrHEP Marie Curie RISE project. Their host is Professor Akihiro Ishibashi.

Quasinormal modes of neutron stars in R^2 gravity

Speaker
Jose Blázquez-Salcedo (Oldenburg U., Germany)
Event date
Venue
Maths. Dept. Room 11.3.21
Event type
In this talk we will discuss the quasinormal modes of neutron stars in modified theories of gravity, in particular, in R^2 gravity. In this model, in addition to the space-time and fluid degrees of freedom that are present in General Relativity, we naturally find a (massive) scalar field.

Tidal effect on scalar cloud

Speaker
Taishi Ikeda (IST-Lisbon)
Event date
Venue
Maths. Dept. Room Sousa Pinto
Event type
The existence of light, fundamental bosonic fields is an attractive possibility that can be tested via black hole observations. 
We study the effect of a tidal field -- caused by a companion star or black hole -- on the evolution of superradiant scalar-field states around spinning black holes.

Visit of Nelson Eiró, Aichen Li and Ruyong Li

Nelson Eiró visited Gr@v just before successfully defending his M.Sc. thesis on "Strong lensing of light and shadow of a Black Hole surrounded by a heavy accretion disk", at IST-Lisbon, supervised by C. Herdeiro and P. Cunha. This visit coincided with the beginning of a long term visit by Aichen and Ruyong Li, both graduates from Beijing University of Technology.