Visit of Laura Bernard
Laura Bernard visited us in the beginning of April 2025. Thank you for the visit and seminar Laura!
Strong Gravity News & Events
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!
Nonlinearities in black hole ringdown
Speaker
Adrien Kuntz (CENTRA, IST)
Event date
Venue
Hybrid: room 11.2.21 and Zoom
Event type
Nonlinear effects in black hole perturbation theory may be important for describing a black hole ringdown, as suggested by recent works. I will describe a new class of "quadratic" quasi-normal modes at second order in perturbation theory. Remarkably, not only their frequency but also their amplitude is completely determined by the linear modes themselves.
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 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.
Discussion of the paper "Gravitational Magnus effect from scalar dark matter", by Z. Wang et al.
Speaker
Miguel Zilhão (U. Aveiro)
Event date
Venue
Hybrid: Room Sousa Pinto and Zoom
Ends on
Event type
Gravitational Magnus effect from scalar dark matter
Zipeng Wang, Thomas Helfer, Dina Traykova, Katy Clough, Emanuele Berti
Two six-months researcher positions
Two positions for a Researcher (with Ph.D.) are open within the project Towards Precision Tests of Ultralight Dark Matter with Gravitational Imaging Waves. Application deadline: March 13, 2025. More info in Euraxess.
Curvature dependence of gravitational-wave tests: from theory to observation
Speaker
Laura Bernard (Laboratoire d’étude de l’Univers et des phénomènes eXtrêmes)
Event date
Venue
Hybrid: room 11.2.21 and Zoom
Event type
Next generation of gravitational wave detectors will have the sensibility to detect potential deviations in gravitational waveforms with respect to general relativity. However, current agnostic tests are plagued by a lack of realistic deviations, making it difficult to interpret such detections with respect to specific theories.