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- University of Tennessee at KnoxvilleUS110 papers
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8 papers · 2 filters
f(T) gravity mimicking dynamical dark energy. Background and perturbation analysis
James B. Dent, Sourish Dutta, Emmanuel N. Saridakis
We investigate f(T) cosmology in both the background, as well as in the perturbation level, and we present the general formalism for reconstructing the equivalent one-parameter fam…
Cosmological perturbations in f(T) gravity
Shih-Hung Chen, James B. Dent, Sourish Dutta +1
We investigate the cosmological perturbations in f(T) gravity. Examining the pure gravitational perturbations in the scalar sector using a diagonal vierbien, we extract the corresp…
Three-Point Correlation Functions of SDSS Galaxies: Luminosity and Color Dependence in Redshift and Projected Space
Cameron K. McBride, Andrew J. Connolly, Jeffrey P. Gardner +5
The three-point correlation function (3PCF) provides an important view into the clustering of galaxies that is not available to its lower order cousin, the two-point correlation fu…
Big Bang nucleosynthesis with a stiff fluid
Sourish Dutta, Robert J. Scherrer
Models that lead to a cosmological stiff fluid component, with a density that scales as , where is the scale factor, have been proposed recently in a variety of c…
Dark Energy, with Signatures
Sourish Dutta, Stephen D. H. Hsu, Robert J. Scherrer
We propose a class of simple dark energy models which predict a late-time dark radiation component and a distinctive time-dependent equation of state for redshift . T…
Parametrization for the Scale Dependent Growth in Modified Gravity
Juan C. Bueno Sanchez, James B. Dent, Sourish Dutta +1
We propose a scale dependent analytic approximation to the exact linear growth of density perturbations in Scalar-Tensor (ST) cosmologies. In particular, we show that on large subh…