1 code implementation • 1 Sep 2020 • Digvijay Wadekar, Mikhail M. Ivanov, Roman Scoccimarro
We use analytic covariance matrices to carry out a full-shape analysis of the galaxy power spectrum multipoles from the Baryon Oscillation Spectroscopic Survey (BOSS).
Cosmology and Nongalactic Astrophysics
3 code implementations • 11 Sep 2019 • Francisco Villaescusa-Navarro, ChangHoon Hahn, Elena Massara, Arka Banerjee, Ana Maria Delgado, Doogesh Kodi Ramanah, Tom Charnock, Elena Giusarma, Yin Li, Erwan Allys, Antoine Brochard, Chi-Ting Chiang, Siyu He, Alice Pisani, Andrej Obuljen, Yu Feng, Emanuele Castorina, Gabriella Contardo, Christina D. Kreisch, Andrina Nicola, Roman Scoccimarro, Licia Verde, Matteo Viel, Shirley Ho, Stephane Mallat, Benjamin Wandelt, David N. Spergel
The Quijote simulations are a set of 44, 100 full N-body simulations spanning more than 7, 000 cosmological models in the $\{\Omega_{\rm m}, \Omega_{\rm b}, h, n_s, \sigma_8, M_\nu, w \}$ hyperplane.
Cosmology and Nongalactic Astrophysics Instrumentation and Methods for Astrophysics
1 code implementation • 6 Sep 2016 • ChangHoon Hahn, Roman Scoccimarro, Michael R. Blanton, Jeremy L. Tinker, Sergio Rodriguez-Torres
Using simulated mock catalogs, we demonstrate that fiber collisions have a significant impact on the power spectrum, $P(k)$, monopole and quadrupole that exceeds sample variance at scales smaller than $k\sim0. 1~h/Mpc$.
Cosmology and Nongalactic Astrophysics
2 code implementations • 22 Dec 2015 • Emiliano Sefusatti, Martin Crocce, Roman Scoccimarro, Hugh Couchman
Efficient estimators of Fourier-space statistics for large number of objects rely on Fast Fourier Transforms (FFTs), which are affected by aliasing from unresolved small scale modes due to the finite FFT grid.
Cosmology and Nongalactic Astrophysics
1 code implementation • 12 Jul 2004 • Roman Scoccimarro
We caution that a commonly used ansatz to model the redshift-space power spectrum gives rise to an unphysical distribution of pairwise velocities, and show that it is in general impossible to derive the distribution from measurements of redshift-space clustering.
astro-ph
no code implementations • 6 Apr 2000 • Roman Scoccimarro
In this paper we consider the effect on the bispectrum of stochastic non-linear biasing, radial redshift distortions, non-Gaussian initial conditions, survey geometry and sampling.
astro-ph
