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43 papers · 1 filter
Search for gravitational wave ringdowns from perturbed black holes in LIGO S4 data
The LIGO Scientific Collaboration, B. Abbott
According to general relativity a perturbed black hole will settle to a stationary configuration by the emission of gravitational radiation. Such a perturbation will occur, for exa…
Thermodynamic structure of Lanczos-Lovelock field equations from near-horizon symmetries
Dawood Kothawala, T. Padmanabhan
It is well known that, for a wide class of spacetimes with horizons, Einstein equations near the horizon can be written as a thermodynamic identity. It is also known that the Einst…
Induced cosmological constant and other features of asymmetric brane embedding
Yuri Shtanov, Varun Sahni, Arman Shafieloo +1
We investigate the cosmological properties of an "induced gravity" brane scenario in the absence of mirror symmetry with respect to the brane. We find that brane evolution can proc…
Search for Gravitational Waves from Low Mass Binary Coalescences in the First Year of LIGO's S5 Data
LIGO Scientific Collaboration, B. Abbott
We have searched for gravitational waves from coalescing low mass compact binary systems with a total mass between 2 and 35 Msun and a minimum component mass of 1 Msun using data f…
Focusing versus defocusing properties of truly naked black holes
Naresh Dadhich, Oleg B. Zaslavskii
We study the properties of the congruence of null geodesics propagating near the so-called truly naked horizons (TNH) - objects having finite Kretschmann scalar but with diverging…
Is gravitational entropy quantized ?
Dawood Kothawala, T. Padmanabhan, Sudipta Sarkar
In Einstein's gravity, the entropy of horizons is proportional to their area. Several arguments given in the literature suggest that, in this context, both area and entropy should…