Gravity wave analogues of black holes

Dumb holes: analogues for black holes.

The use of sonic analogues to black and white holes, called dumb or deaf holes, to understand the particle production by black holes is reviewed. The results suggest that the black hole particle production is a low-frequency and low-wavenumber process.

Non-singular Gravity without Black Holes Non-singular Gravity without Black Holes

Canada " What are the everywhere regular solutions of these field equations? " Abstract A non-singular static spherically symmetric solution of the nonsymmetric gravita-tional and electromagnetic theory (NGET) field equations is derived, which depends on the four parameters m, ℓ 2 , Q and s, where m is the mass, Q is the electric charge, ℓ 2 is the NGT charge of a body and s is a dimensionless ...

Instability of black holes in massive gravity

Eugeny Babichev ∗ and Alessandro Fabbri † Laboratoire de Physique Théorique d’Orsay, Bâtiment 210, Université Paris-Sud 11, F-91405 Orsay Cedex, France Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, Piazza del Viminale 1, 00184 Roma, Italy; Dipartimento di Fisica dellUniversità di Bologna, Via Irnerio 46, 40126 Bologna, Italy; Departamento de F́ısica Teórica and IFIC, Univers...

The black holes of topologically massive gravity

We show that an analytical continuation of the Vuorio solution to three-dimensional topologically massive gravity leads to a two-parameter family of black hole solutions, which are geodesically complete and causally regular within a certain parameter range. No observers can remain static in these spacetimes. We discuss their global structure, and evaluate their mass, angular momentum, and entro...

Black holes in three-dimensional topological gravity.