1.5k citations · 1.6k across the 12 of their papers we have counts for
12 papers
Radiation from a D-dimensional collision of shock waves: Two dimensional reduction and Carter-Penrose diagram
Flávio S. Coelho, Marco O. P. Sampaio
We analyse the causal structure of the two dimensional (2D) reduced background used in the perturbative treatment of a head-on collision of two -dimensional Aichelburg-Sexl grav…
Radiation from a -dimensional collision of gravitational shock waves
Flávio S. Coelho
Classically, if two highly boosted particles collide head-on, a black hole is expected to form whose mass may be inferred from the gravitational radiation emitted during the collis…
Testing General Relativity with Present and Future Astrophysical Observations
Emanuele Berti, Enrico Barausse, Vitor Cardoso +50
One century after its formulation, Einstein's general relativity has made remarkable predictions and turned out to be compatible with all experimental tests. Most of these tests pr…
Radiation from a -dimensional collision of shock waves: proof of first order formula and angular factorisation at all orders
Flávio S. Coelho, Carlos Herdeiro, Marco O. P. Sampaio
In two previous papers we have computed the inelasticity in a head-on collision of two -dimensional Aichelburg-Sexl shock waves, using perturbation theory to calculate the g…
PPN expansion and FRW scalar perturbations in n-DBI gravity
Flávio S. Coelho, Carlos Herdeiro, Shinji Hirano +1
n-DBI gravity explicitly breaks Lorentz invariance by the introduction of a unit time-like vector field, thereby giving rise to an extra (scalar) degree of freedom. We look for obs…
n-DBI Gravity in a nutshell
Flavio S. Coelho, Carlos Herdeiro, Shinji Hirano +1
We present a new model of gravity which explicitly breaks Lorentz-invariance by the introduction of a unit time-like vector field, thereby giving rise to an extra (scalar) degree o…
Radiation from a D-dimensional collision of shock waves: an insight allowed by the D parameter
F. S. Coelho, C. Herdeiro, C. Rebelo +1
We consider the radiation emitted in a collision of shock waves, in D-dimensional General Relativity (GR), and describe a remarkably simple pattern, hinting at a more fundamental s…
n-DBI gravity, maximal slicing and the Kerr geometry
Flavio S. Coelho, Carlos Herdeiro, Mengjie Wang
Recently, in arXiv:1110.0832, we have established that solutions of Einstein's gravity admitting foliations with a certain geometric condition are also solutions of n-DBI gravity,…
Radiation from a D-dimensional collision of shock waves: higher order set up and perturbation theory validity
Flávio S. Coelho, Carlos Herdeiro, Carmen Rebelo +1
The collision of two D-dimensional, ultra-relativistic particles, described in General Relativity as Aichelberg-Sexl shock waves, is inelastic. In first order perturbation theory,…
On the scalar graviton in n-DBI gravity
Flavio S. Coelho, Carlos Herdeiro, Shinji Hirano +1
n-DBI gravity is a gravitational theory which yields near de Sitter inflation spontaneously at the cost of breaking Lorentz invariance by a preferred choice of foliation. We show t…
Radiation from a D-dimensional collision of shock waves: a remarkably simple fit formula
Flávio S. Coelho, Carlos Herdeiro, Marco O. P. Sampaio
Recently, in arXiv:1105.2298 [hep-th], we have estimated the energy radiated in the head-on collision of two equal D-dimensional Aichelburg-Sexl shock waves, for even D, by solving…
Relativistic Euler's 3-body problem, optical geometry and the golden ratio
Flavio S. Coelho, Carlos A. R. Herdeiro
A Weyl solution describing two Schwarzschild black holes is considered. We focus on the Z_2 invariant solution, with ADM mass M_{ADM}=2M_K, where M_K is the Komar mass of each blac…