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# Extreme Computing at CFP

A collaboration between CFP, CENTRA/IST, Rome and Barcelona has been granted one and a half million CPU hours under the very competitive DEISA Extreme Computing Initiative (DECI-6). This computing time will be used for studying black hole collisions and the resulting emission of gravitational radiation. These processes are relevant in astrophysics, mathematical physics and high energy physics.

The Distributed European Infrastructure for Supercomputing Applications (DEISA) Extreme Computing Initiative "is aiming at leading, ground breaking applications in selected areas of science and technology dealing with complex, demanding, innovative simulations with a label of excellence from at least one national evaluation committee." (DEISA citation)This year's initiative got a record of 122 applications involving researchers from 30 countries - 22 in Europe and eight from the continents of America, Asia, and Australasia. More than half a billion compute-hours have been requested, an over-subscription by a factor of ten. (Source)

The collaboration between CFP, CENTRA/IST, Rome and Barcelona has been granted one and a half million CPU hours, 100% of their requested computing time.

The team, involving CFP members Carlos Herdeiro and Miguel Zilhão, is a joint collaboration with Vitor Cardoso (PI), Andrea Nerozzi and Helvi Witek (CENTRA/IST), Leonardo Gualtieri (Rome) and Ulrich Sperhake (Barcelona). These researchers are trying to understand what happens when black holes collide, a fundamental process in General Relativity with applications to astrophysics, mathematical physics and collider physics.

Collisions of black holes generate a huge amount of gravitational radiation, which can be measured by current gravitational-wave detectors. Moreover, they can answer long-standing questions in the field, which physicists such as Stephen Hawking have been trying to understand for decades. For instance, if the black holes collide at sufficiently large velocities, can one "strip" the event horizon off, and end up with a naked singularity?

Additionally, scenarios that have emerged from high energy physics, suggest that these collisions might be relevant for understanding processes occurring in particle accelerators, such as the Large Hadron Collider at CERN.

The computational time just awarded will allow the team to investigate these and other issues. For further details on the team's work, see

For further information on DEISA see