714 citations
- Max Planck Institute for Gravitational PhysicsDE8 papers
- Harish-Chandra Research InstituteIN7 papers
- California Institute of TechnologyUS5 papers
- University of SouthamptonGB5 papers
- Andrews UniversityUS4 papers
- Australian National UniversityAU4 papers
- Cardiff UniversityGB4 papers
- Carleton CollegeUS4 papers
- Charles Sturt UniversityAU4 papers
- Columbia UniversityUS4 papers
- Embry–Riddle Aeronautical UniversityUS4 papers
- Goddard Space Flight CenterUS4 papers
30 papers · 1 filter
Two new diagnostics of dark energy
Varun Sahni, Arman Shafieloo, Alexei A. Starobinsky
We introduce two new diagnostics of dark energy (DE). The first, Om, is a combination of the Hubble parameter and the cosmological redshift and provides a "null test" of dark energ…
Nonlinear magnetic diffusivity and alpha tensors in helical turbulence
A. Brandenburg, K. -H. Rädler, M. Rheinhardt +1
The effect of a dynamo-generated mean magnetic field of Beltrami type on the mean electromotive force is studied. In the absence of the mean magnetic field the turbulence is assume…
Kinematic alpha effect in isotropic turbulence simulations
Sharanya Sur, Axel Brandenburg, Kandaswamy Subramanian
Using numerical simulations at moderate magnetic Reynolds numbers up to 220 it is shown that in the kinematic regime, isotropic helical turbulence leads to an alpha effect and a tu…
Influence of the jet opening angle on the derived kinematical parameters of blazar jets having uniform and stratified bulk motion
Gopal-Krishna, Samir Dhurde, Pronoy Sircar +1
We present analytical modelling of conical relativistic jets, in order to evaluate the role of the jet opening angle on certain key parameters that are inferred from VLBI radio obs…
CMB anisotropy power spectrum using linear combinations of WMAP maps
Rajib Saha, Simon Prunet, Pankaj Jain +1
In recent years the goal of estimating different cosmological parameters precisely has set new challenges in the effort to accurately measure the angular power spectrum of CMB. Thi…
Bound for entropy and viscosity ratio for strange quark matter
Manjari Bagchi, Jishnu Dey, Mira Dey +4
High energy density ($\eps$) and temperature (T) links general relativity and hydrodynamics leading to a lower bound for the ratio of shear viscosity () and entropy density (…