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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,…