Best Pitch award for Jorge Delgado
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!
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.
Abstract:
The ability to model the evolution of compact binaries from the inspiral to coalescence is central to gravitational wave astronomy. Current waveform catalogues are built from vacuum binary black hole models, by evolving Einstein equations numerically and complementing them with knowledge from slow-motion expansions.