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5 papers · 2 filters
Faraday Rotation of the Cosmic Microwave Background Polarization by a Stochastic Magnetic Field
Arthur Kosowsky, Tina Kahniashvili, George Lavrelashvili +1
A primordial cosmological magnetic field induces Faraday rotation of the cosmic microwave background polarization. This rotation produces a curl-type polarization component even wh…
Cosmological Magnetic Fields vs. CMB
Tina Kahniashvili
I present a short review of the effects of a cosmological magnetic field on the CMB temperature and polarization anisotropies. Various possibilities for constraining the magnetic f…
Constraints on Scalar-Field Dark Energy from Galaxy Cluster Gas Mass Fraction versus Redshift
Gang Chen, Bharat Ratra
We use the Allen et al. (2004) Chandra measurements of x-ray gas mass fraction of 26 rich clusters to place constraints on the scalar-field dark energy model with inverse power law…
Looking for Cosmological Alfven Waves in WMAP Data
Gang Chen, Pia Mukherjee, Tina Kahniashvili +2
A primordial cosmological magnetic field induces and supports vorticity or Alfven waves, which in turn generate cosmic microwave background (CMB) anisotropies. A homogeneous primor…
Constraints on Scalar-Field Dark Energy from the Cosmic Lens All-Sky Survey Gravitational Lens Statistics
Kyu-Hyun Chae, Gang Chen, Bharat Ratra +1
We use the statistics of strong gravitational lensing based on the Cosmic Lens All-Sky Survey (CLASS) data to constrain cosmological parameters in a spatially-flat, inverse power-l…