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6 papers · 2 filters
Implications for the Origin of GRB 070201 from LIGO Observations
LIGO Scientific Collaboration, K. Hurley
We analyzed the available LIGO data coincident with GRB 070201, a short duration hard spectrum gamma-ray burst whose electromagnetically determined sky position is coincident with…
Direction-Dependent CMB Power Spectrum and Statistical Anisotropy from Noncommutative Geometry
Earnest Akofor, A. P. Balachandran, Sang G. Jo +2
Modern cosmology has now emerged as a testing ground for theories beyond the standard model of particle physics. In this paper, we consider quantum fluctuations of the inflaton sca…
The Adiabatic Instability on Cosmology's Dark Side
Rachel Bean, Eanna E. Flanagan, Mark Trodden
We consider theories with a nontrivial coupling between the matter and dark energy sectors. We describe a small scale instability that can occur in such models when the coupling is…
Adiabatic instability in coupled dark energy-dark matter models
Rachel Bean, Eanna E. Flanagan, Mark Trodden
We consider theories in which there exists a nontrivial coupling between the dark matter sector and the sector responsible for the acceleration of the universe. Such theories can p…
Creating Statistically Anisotropic and Inhomogeneous Perturbations
C. Armendariz-Picon
In almost all structure formation models, primordial perturbations are created within a homogeneous and isotropic universe, like the one we observe. Because their ensemble averages…
Upper limit map of a background of gravitational waves
The LIGO Scientific Collaboration, B. Abbott
We searched for an anisotropic background of gravitational waves using data from the LIGO S4 science run and a method that is optimized for point sources. This is appropriate if, f…