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21 papers · 2 filters
Complementarity of Weak Lensing and Peculiar Velocity Measurements in Testing General Relativity
Yong-Seon Song, Gong-Bo Zhao, David Bacon +3
We explore the complementarity of weak lensing and galaxy peculiar velocity measurements to better constrain modifications to General Relativity. We find no evidence for deviations…
Channeling in solid Xe, Ar and Ne direct dark matter detectors
Nassim Bozorgnia, Graciela B. Gelmini, Paolo Gondolo
The channeling of the ion recoiling after a collision with a WIMP changes the ionization signal in direct detection experiments, producing a larger scintillation or ionization sign…
Waterfall field in hybrid inflation and curvature perturbation
Jinn-Ouk Gong, Misao Sasaki
We study carefully the contribution of the waterfall field to the curvature perturbation at the end of hybrid inflation. In particular we clarify the parameter dependence analytica…
Topology of large scale structure as test of modified gravity
Xin Wang, Xuelei Chen, Changbom Park
The genus of the iso-density contours is a robust measure of the topology of large scale structure, and it is relatively insensitive to nonlinear gravitational evolution, galaxy bi…
Modelling the shapes of the largest gravitationally bound objects
Graziano Rossi, Ravi K. Sheth, Giuseppe Tormen
We combine the physics of the ellipsoidal collapse model with the excursion set theory to study the shapes of dark matter halos. In particular, we develop an analytic approximation…
Cluster number counts in quintessence models
Seokcheon Lee, Kin-Wang Ng
Even though the abundance and evolution of clusters have been used to study the cosmological parameters including the properties of dark energy owing to their pure dependence on th…