The observation of the shadow of the supermassive black hole M87∗ by the Event Horizon Telescope (EHT) is sensitive to the spacetime geometry near the circular photon orbit and beyond, and it thus has the potential to test general relativity in the strong field regime.
K-essence is a cosmologically relevant scalar-tensor theory that involves first-order derivative self-interactions, which pass all existing gravitational wave bounds and provides a screening mechanism. In this talk, I will present our results about the effect of this screening mechanism in non-linear stellar oscillations and gravitational collapse by using numerical relativity simulations.
Haroldo Lima Junior, Ph.D. student at the U. Federal do Pará, Brazil, advised by Prof. Luis Crispino, is visiting our group for 6 months (Sep 2021 - Mar 2022), under a CAPES "doutorado sandwich" funding.
Rodrigo Vicente, a Ph.D. student co-advised in our group, successfully defended his Ph.D. thesis on "The Gravity of Classical Fields and its effect on the Dynamics of Gravitational Systems", at IST Lisbon on September 21st 2021. Congratulations Rodrigo!
The COST Advanced School on the "Physics of Dark Matter and Hidden Sectors" will take place in Lund, Sweeden, from October 18-21st 2021. Gr@v members C. Herdeiro, A. Morais and F. Freitas are amongst the invited lecturers.
Testing the Black-Hole Area Law with GW150914
Maximiliano Isi, Will M. Farr, Matthew Giesler, Mark A. Scheel, and Saul A. Teukolsky Phys. Rev. Lett. 127, 011103
The Spanish-Portuguese Relativity Meeting 2021 took place online from 13-16 September 2021, organized by our group. With over 200 registered participants and 95 talks (invited, contributed and one public lecture), the meeting exhibited the interdisciplinarity of this thriving field. Talk slides can be found in the program webpage. We hope to have a face to face EREP 2022!
Our group coordinated the "Numerical Relativity and High Energy Physics" IRSES network (2012-2015). Here is a list of the global network meetings organized:
