Search Results for author: Seshadri Nadathur

Found 4 papers, 1 papers with code

Beyond BAO: improving cosmological constraints from BOSS with measurement of the void-galaxy cross-correlation

no code implementations1 Apr 2019 Seshadri Nadathur, Paul M. Carter, Will J. Percival, Hans A. Winther, Julian Bautista

Combining void information with that from BAO and galaxy RSD in the same CMASS sample, we measure $D_A(0. 57)/r_s=9. 36\pm0. 07$ (at 0. 75% precision), $H(0. 57)r_s=(14. 03\pm0. 16)\;10^3$ kms$^{-1}$Mpc$^{-1}$ (1. 1%) and $f\sigma_8=0. 450\pm0. 019$ (4. 2%), consistent with cosmic microwave background (CMB) measurements from Planck.

Cosmology and Nongalactic Astrophysics

A Zeldovich reconstruction method for measuring redshift space distortions using cosmic voids

no code implementations23 May 2018 Seshadri Nadathur, Paul Carter, Will Percival

Linear theory models of $\xi^s$ are able to provide extremely good descriptions of simulation data on all scales provided the real space void positions are known.

Cosmology and Nongalactic Astrophysics

An accurate linear model for redshift space distortions in the void-galaxy correlation function

no code implementations20 Dec 2017 Seshadri Nadathur, Will J. Percival

We derive a linear theory model for the redshift space void-galaxy correlation that is valid at all pair separations, including deep within the void, and use this to obtain expressions for the monopole $\xi^s_0$ and quadrupole $\xi^s_2$ contributions.

Cosmology and Nongalactic Astrophysics

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