Yasha Shnir (from Dubna, Russia) and Massimo Vaglio (from Rome, Italy) visited our group in June-July 2021 within the COST action GWVerse, to strengthen the collaboration with different group members, on several aspects of strong gravity. Thank you for your visit!
Gr@v Ph.D. student Jorge Delgado got a best pitch award for his pitch (short talk) in the UA Research Summit 2021, in the session for students of the MAP-Fis Ph.D. programme. Congratulations Jorge!
A call for a 2 years postdoctoral grant in Strong Gravity, within the research grant “Testing the Kerr hypothesis with gravitational waves and lensing", PTDC / FIS-AST / 3041/2020, is open from 1 to 20 August 2021. See attached document for details (in Portuguese) or the Euraxess announcement (in Portuguese and English) here.
The photon ring is a narrow ring-shaped feature, predicted by General Relativity but not yet observed, that appears on images of sources near a black hole. It is caused by extreme bending of light within a few Schwarzschild radii of the event horizon and provides a direct probe of the unstable bound photon orbits of the Kerr geometry.
Bosonic stars are multipurpose gravitational solitions and dark matter contenders. Yet, as shown in a paper co-authored by Gr@v members. N. Sanchis-Gual, C. Herdeiro and E. Radu published in Physical Review Letters, the known solutions are just the just the tip of the iceberg... and the new configurations unveil a mechanism that provides dynamical stability.
A call for a 1 year grant for a M.Sc.holder, within the research grant “Testing the Kerr hypothesis with gravitational waves and lensing", PTDC/FIS-AST/3041/2020, is open. The call closes on June 30th 2021.
See attached documents for details or the eracareers announcement here.
Wormholes in spacetime and their use for interstellar travel: A tool for teaching general relativity
M. S. Morris and K. S. Thorne
Am. J. Phys. 56 (1988) 395-412
In a paper published in Phys. Rev. Lett, Gr@v member Nico Sanchis-Gual and co-authors reports a degeneracy between the gravitational-wave signals emitted in quasi-circular precessing black-hole mergers and those from extremely eccentric mergers, namely head-on collisions.
