Two papers in Physical Review Letters

Thursday, July 11, 2013

Two papers by our group have been accepted in Physical Review Letters in the past few weeks.

The first paper, Gravito-Electromagnetic Perturbations of Kerr-Newman Black Holes: Stability and Isospectrality in the Slow-Rotation Limit , presents the first calculation of the coupled gravitational/electromagnetic oscillation modes of charged, rotating black holes. This is a difficult technical problem that we solved by working in the limit where the black hole spins slowly. Quite interestingly, we found that oscillations of opposite parity have the same oscillation frequencies up to linear order in the black hole rotation.

The second paper, Universality, maximum radiation and absorption in high-energy collisions of black holes with spin, is an interesting tale of “black hole cannibalism”: using numerical simulations, we showed that when two black holes collide at speeds close to the speed of light they “eat” (absorb) about half of the gravitational radiation produced in the process. This sets an upper limit to the maximum energy that can be radiated in high-speed black hole encounters. A story about this paper can be found in the Ole Miss News website.

eLISA White Paper

Wednesday, May 29, 2013

ESA has recently published a call for White Papers describing science themes for the next large ESA missions L2 and L3 to be launched in 2028 and 2034. The White Paper The Gravitational Universe, supporting the case for a spaceborne low-frequency gravitational wave observatory to be launched in 2028, was submitted on May 24 and it is now available on the arXiv. You can join the ranks of Stephen Hawking, Kip Thorne and many others who support the eLISA science case here.

Congratulations to Davide Gerosa - again!

Thursday, May 9, 2013

Davide was just awarded a prestigious Newton Fellowship from Cambridge University (UK). Congratulations!

Blue Apple Award and GCGM7 talks

Sunday, April 21, 2013

Congratulations to Laleh Sadeghian from Washington University in Saint Louis (but currently at the University of Florida), who won the Blue Apple Award at the 7th Gulf Coast Gravity Meeting with the talk “Dark matter distributions around massive black holes: A fully general relativistic approach”.

You can find Laleh’s talk (as well as the other talks) here.

Thanks to all participants, and see you soon at the next GCGM!

Welcome to the participants of the 7th Gulf Coast Gravity Meeting!

Friday, April 19, 2013

The 7th Gulf Coast Gravity Meeting started this morning in a somewhat unseasonably chilly Oxford. A (much needed) warm welcome to all participants!