publication . Article . Preprint . Other literature type . 2019

Emulating galaxy clustering and galaxy–galaxy lensing into the deeply non-linear regime: methodology, information, and forecasts

Wibking, Benjamin D; Salcedo, Andrés N; Weinberg, David H; Garrison, Lehman H; Ferrer, Douglas; Tinker, Jeremy; Eisenstein, Daniel; Metchnik, Marc; Pinto, Philip;
Open Access
  • Published: 01 Mar 2019 Journal: Monthly Notices of the Royal Astronomical Society, volume 484, pages 989-1,006 (issn: 0035-8711, eissn: 1365-2966, Copyright policy)
  • Publisher: Oxford University Press (OUP)
Abstract
The combination of galaxy-galaxy lensing (GGL) with galaxy clustering is one of the most promising routes to determining the amplitude of matter clustering at low redshifts. We show that extending clustering+GGL analyses from the linear regime down to $\sim 0.5 \, h^{-1}$ Mpc scales increases their constraining power considerably, even after marginalizing over a flexible model of non-linear galaxy bias. Using a grid of cosmological N-body simulations, we construct a Taylor-expansion emulator that predicts the galaxy autocorrelation $\xi_{\text{gg}}(r)$ and galaxy-matter cross-correlation $\xi_{\text{gm}}(r)$ as a function of $\sigma_8$, $\Omega_m$, and halo occu...
Subjects
arXiv: Astrophysics::Cosmology and Extragalactic Astrophysics
free text keywords: Space and Planetary Science, Astronomy and Astrophysics, Redshift, Sigma, Weak gravitational lensing, Physics, Omega, Astrophysics, Halo occupation distribution, Cluster analysis, Dark energy, Astronomy, Galaxy, Astrophysics - Cosmology and Nongalactic Astrophysics
Funded by
NSF| Large Scale Structure Probes of Cosmic Acceleration
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 1516997
,
NSF| MRI: Acquisition of a Graphics Processor Unit-Accelerated High Performance Computer for Astrophysics, Computer Science, and Broad Numerical Research at the University of Arizona
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 1228509
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Astronomical Sciences
,
NSF| Graduate Research Fellowship Program (GRFP)
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 1343012
  • Funding stream: Directorate for Education & Human Resources | Division of Graduate Education
,
NSF| Collaborative Research: Abacus: A New State-of-the-Art Cosmological N-body Code
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 1313285
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Astronomical Sciences
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publication . Article . Preprint . Other literature type . 2019

Emulating galaxy clustering and galaxy–galaxy lensing into the deeply non-linear regime: methodology, information, and forecasts

Wibking, Benjamin D; Salcedo, Andrés N; Weinberg, David H; Garrison, Lehman H; Ferrer, Douglas; Tinker, Jeremy; Eisenstein, Daniel; Metchnik, Marc; Pinto, Philip;