Hosting collegues
In the first half of May 2025, Gr@v hosted many wonderful collegues, including Isabel Cordero (U. Valencia, Spain),
Astrophysics News & Events
Stability of Boson Stars as Black Hole Mimickers
Speaker
Gareth Marks (University of Cambridge, Department of Applied Mathematics and Theoretical Physics)
Event date
Venue
Hybrid: room 11.2.25 and Zoom
Event Website
Event type
We discuss recent results on using boson stars with a solitonic potential as models of ultracompact objects, which could mimic black holes in such phenomenology as VLBI images and gravitational wave signals.
Gonçalo Gonçalves
Full Name: Goncalo Filipe Mota Goncalves
Postion: PhD Student
Degrees: Msc in Theoretical Physics, Faculty of Sciences of the University of Porto, 2024; BSC in Physics, Faculty of Sciences of the University of Coimbra, 2021
Visual Signatures of Scalar Hair in the Images of Accretion Disks and Shadows of Rotating Hairy Black Holes
Speaker
Galin Gyulchev (Sofia University “St. Kliment Ohridski”)
Event date
Venue
Hybrid: room 10.3.7 (DEGEIT) and Zoom
Event Website
Event type
We examine the images and shadows of thin accretion disks around rotating hairy black holes characterized by two non-trivial, time-periodic scalar fields, whose target space possesses non-flat Gaussian curvature.
Visit of Laura Bernard
Laura Bernard visited us in the beginning of April 2025. Thank you for the visit and seminar Laura!
Zeus Sales thesis defense
Zeus Sales Moreira successfully defended his Ph.D. thesis on March 31st 2025, which was advised by C. Herdeiro. The committee was composed by Profs. Darío Nunez, Eugen Radu, Alberto Saa and Gonzalmo Olmo and unanimously praised the excellent work of the candidate. Congratulations Zeus and all the best for the future!
NewFunFiCO mid term meeting
The NewFunFiCO mid term meeting took place online on March 20 bringing together many consortium members, to share their experiences with the REA.
Gravitational Lensing in the Kerr Spacetime: An Analytic Approach for Light and High-Frequency Gravitational Waves
Speaker
Torben Frost (Kavli Institute for Astronomy and Astrophysics, Peking University)
Event date
Venue
Online (Zoom)
Event type
Black holes are the most massive objects in the Universe and provide an ideal testing ground for gravity in the strong field regime.
ROXAS: a spectral code for isolated neutron stars oscillations
Speaker
Gaël Servignat (Laboratoire Astroparticule et Cosmologie)
Event date
Venue
Hybrid: room 11.2.21 and Zoom
Event Website
Event type
Relativistic hydrodynamics has undergone major development over the past three decades, notably through high-resolution shock-capturing schemes enabled by conservative formulations of the relativistic fluid equations.
Turbulence in Magnetised Neutron Stars
Speaker
William Cook (Theoretical Physics Institute, Friedrich-Schiller University Jena)
Event date
Venue
Hybrid: room 11.2.25 and Zoom
Event type
The magnetic field configuration in the interior of Neutron Stars is an open problem and may be impacted by the influence of a turbulent cascade within the star. Assessing the impact of turbulent flow with numerical simulations requires incredibly high resolution as well as long lived simulations covering multiple Alfven times.