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Constraints on dark energy from the Lyα forest baryon acoustic oscillations measurement of the redshift 2.3 Hubble parameter
Omer Farooq, Bharat Ratra
We use the Busca et al. (2012) measurement of the Hubble parameter at redshift z = 2.3 in conjunction with 21 lower z measurements, from Simon et al. (2005), Gaztanaga et al. (2009…
Hubble parameter measurement constraints on dark energy
Omer Farooq, Data Mania, Bharat Ratra
We use 21 Hubble parameter versus redshift data points, from Gaztañaga et al. (2009), Stern et al. (2010), and Moresco et al. (2012), to place constraints on model parameters of co…
Forecasting cosmological parameter constraints from near-future space-based galaxy surveys
Anatoly Pavlov, Lado Samushia, Bharat Ratra
The next generation of space-based galaxy surveys are expected to measure the growth rate of structure to about a percent level over a range of redshifts. The rate of growth of str…
Evolution of inflation-generated magnetic field through phase transitions
Tina Kahniashvili, Axel Brandenburg, Leonardo Campanelli +2
We study the evolution of an inflation-generated magnetic field, due to its coupling to fluid motions, during cosmological phase transitions. We find that the magnetic field stays…
The impact of a new median statistics prior on the evidence for dark radiation
Erminia Calabrese, Maria Archidiacono, Alessandro Melchiorri +1
Recent analyses that include cosmic microwave background (CMB) anisotropy measurements from the Atacama Cosmology Telescope and the South Pole Telescope have hinted at the presence…
Quark-hadron phase transition in a chameleon Brans-Dicke model of brane gravity
Kh. Saaidi, A. Mohammadi, T. Golanbari +2
In this work, the quark-hadron phase transition in a chameleon Brans-Dicke model of brane world cosmology within an effective model of QCD is investigated. Whereas, in the chameleo…