X Amazonian Workshop on Gravity and Analogue Models
Our group is co-organizing the X Amazonian Workshop on Gravity and Analogue Models from 29 June to 3 July in Belém, Brazil. More info here.
Astrophysics News & Events
NewFunFiCO workshop at Frankfurt
The NewFunFiCO network is organizing a workshop in Frankfurt from 15-17 June 2026. More info here.
Oleg Tsupko joins Gr@v
Oleg Tsupko, an expert in several strong gravity topics including lensing and black hole shadows, joins Gr@v as a CEEC researcher from April 2026. Welcome Oleg!
Discussion of the paper "Image of Kerr-Melvin black hole with thin accretion disk", by Yehui Hou al.
Speaker
Jianzhi Yang (U. Aveiro)
Event date
Venue
Hybrid: Room Sousa Pinto and Microsoft Teams
Ends on
Event type
Discussion of the paper "Properties of general stationary axisymmetric spacetimes: circularity and beyond", by Eugeny Babichev and Jacopo Mazza
Speaker
Etevaldo Costa Filho (U. Aveiro)
Event date
Venue
Hybrid: Room Sousa Pinto and Microsoft Teams
Ends on
Event type
Discussion of the paper "Dephasing in binary black hole mergers surrounded by scalar wave dark matter clouds", by Cheng-Hsin Cheng al.
Speaker
José Ferreira (U. Aveiro)
Event date
Venue
Hybrid: Room Sousa Pinto and Microsoft Teams
Ends on
Event type
Accretion beyond the black hole paradigm: a light from within the shadow
Speaker
Maciek Wielgus (Instituto de Astrofísica de Andalucía - CSIC)
Event date
Venue
Hybrid: Sala 11.2.21 and Teams
Event Website
Event type
I will discuss the first 3D-general relativistic magnetohydrodynamic (GRMHD) simulation of sustained accretion onto a horizonless singularity in which matter falls onto the central object rather than being accumulated outside of it or expelled in outflows.
Equilibrium Magnetized Accretion Discs around Hairy Black Holes
Speaker
Juan José Zaldívar Vázquez (Instituto Nacional de Astrofísica, Óptica y Electrónica, INAOE)
Event date
Venue
Hybrid: Sala 11.2.21 and Teams
Event Website
Event type
Equilibrium accretion tori are used as initial conditions for GRMHD simulations to study accretion onto compact objects. In this talk, I present the construction of magnetized Komissarov-type discs within hairy black hole spacetimes. I show that equilibrium configurations can be consistently obtained in these backgrounds, as in the standard Kerr case.
Probing Vacuum General Relativity: Where to Look and What to Seek?
Speaker
Andrea Maselli (Gran Sasso Science Institute)
Event date
Venue
Hybrid: Sala Sousa Pinto and Teams
Event Website
Event type
Astrophysical environments provide an arena to test vacuum General Relativity with gravitational waves. In this talk, I will discuss what binary black hole observations can probe beyond the vacuum paradigm, and where fundamental limitations arise.