Cosmology with galaxy–galaxy lensing on non-perturbative scales: emulation method and application to BOSS LOWZ
Abstract
ABSTRACT We describe our non-linear emulation (i.e. interpolation) framework that combines the halo occupation distribution (HOD) galaxy bias model with N-body simulations of non-linear structure formation, designed to accurately predict the projected clustering and galaxy–galaxy lensing signals from luminous red galaxies in the redshift range 0.16 < z < 0.36 on comoving scales 0.6 < rp < 30 $$h^{-1} \, \text{Mpc}$$. The interpolation accuracy is ≲ 1–2 per cent across the entire physically plausible range of parameters for all scales considered. We correctly recover the true value of the cosmological parameter S8 = (σ8/0.8228)(Ωm/0.3107)0.6 from mock measurements produced via subhalo abundance matching (SHAM)-based light-cones designed to approximately match the properties of the SDSS LOWZ galaxy sample. Applying our model to Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 14 (DR14) LOWZ galaxy clustering and galaxy-shear cross-correlation measurements made with Sloan Digital Sky Survey (SDSS) Data Release 8 (DR8) imaging, we perform a prototype cosmological analysis marginalizing over wCDM cosmological parameters and galaxy HOD parameters. We obtain a 4.4 per cent measurement of S8 = 0.847 ± 0.037, in 3.5σ tension with the Planck cosmological results of 1.00 ± 0.02. We discuss the possibility of underestimated systematic uncertainties or astrophysical effects that could explain this discrepancy.
- Authors:
-
[1];
[1];
[1];
[4];
- Department of Astronomy and Center for Cosmology and AstroParticle Physics, Ohio State University, 140 W 18th Ave, Columbus, OH 43210 USA
- Berkeley Center for Cosmological Physics, University of California, Berkeley, CA 94720 USA
- Instituto de Astrofísica de Canarias, s/n, E-38205 La Laguna, Tenerife, Spain, Departamento de Física Teórica M8, Universidad Autónoma de Madrid (UAM), Cantoblanco, E-28049 Madrid, Spain
- Harvard-Smithsonian Center for Astrophysics, 60 Garden St., MS-10, Cambridge, MA 02138, USA
- Publication Date:
- Research Org.:
- Krell Institute, Ames, IA (United States); Harvard Univ., Cambridge, MA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC)
- OSTI Identifier:
- 1592788
- Alternate Identifier(s):
- OSTI ID: 1800926
- Grant/Contract Number:
- FG02-97ER25308; SC0013718
- Resource Type:
- Published Article
- Journal Name:
- Monthly Notices of the Royal Astronomical Society
- Additional Journal Information:
- Journal Name: Monthly Notices of the Royal Astronomical Society Journal Volume: 492 Journal Issue: 2; Journal ID: ISSN 0035-8711
- Publisher:
- Oxford University Press
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; Astronomy & Astrophysics; large-scale structure of Universe; cosmological parameters; dark energy; cosmology: observations
Citation Formats
Wibking, Benjamin D., Weinberg, David H., Salcedo, Andrés N., Wu, Hao-Yi, Singh, Sukhdeep, Rodríguez-Torres, Sergio, Garrison, Lehman H., and Eisenstein, Daniel J. Cosmology with galaxy–galaxy lensing on non-perturbative scales: emulation method and application to BOSS LOWZ. United Kingdom: N. p., 2019.
Web. doi:10.1093/mnras/stz3423.
Wibking, Benjamin D., Weinberg, David H., Salcedo, Andrés N., Wu, Hao-Yi, Singh, Sukhdeep, Rodríguez-Torres, Sergio, Garrison, Lehman H., & Eisenstein, Daniel J. Cosmology with galaxy–galaxy lensing on non-perturbative scales: emulation method and application to BOSS LOWZ. United Kingdom. https://doi.org/10.1093/mnras/stz3423
Wibking, Benjamin D., Weinberg, David H., Salcedo, Andrés N., Wu, Hao-Yi, Singh, Sukhdeep, Rodríguez-Torres, Sergio, Garrison, Lehman H., and Eisenstein, Daniel J. Tue .
"Cosmology with galaxy–galaxy lensing on non-perturbative scales: emulation method and application to BOSS LOWZ". United Kingdom. https://doi.org/10.1093/mnras/stz3423.
@article{osti_1592788,
title = {Cosmology with galaxy–galaxy lensing on non-perturbative scales: emulation method and application to BOSS LOWZ},
author = {Wibking, Benjamin D. and Weinberg, David H. and Salcedo, Andrés N. and Wu, Hao-Yi and Singh, Sukhdeep and Rodríguez-Torres, Sergio and Garrison, Lehman H. and Eisenstein, Daniel J.},
abstractNote = {ABSTRACT We describe our non-linear emulation (i.e. interpolation) framework that combines the halo occupation distribution (HOD) galaxy bias model with N-body simulations of non-linear structure formation, designed to accurately predict the projected clustering and galaxy–galaxy lensing signals from luminous red galaxies in the redshift range 0.16 < z < 0.36 on comoving scales 0.6 < rp < 30 $h^{-1} \, \text{Mpc}$. The interpolation accuracy is ≲ 1–2 per cent across the entire physically plausible range of parameters for all scales considered. We correctly recover the true value of the cosmological parameter S8 = (σ8/0.8228)(Ωm/0.3107)0.6 from mock measurements produced via subhalo abundance matching (SHAM)-based light-cones designed to approximately match the properties of the SDSS LOWZ galaxy sample. Applying our model to Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 14 (DR14) LOWZ galaxy clustering and galaxy-shear cross-correlation measurements made with Sloan Digital Sky Survey (SDSS) Data Release 8 (DR8) imaging, we perform a prototype cosmological analysis marginalizing over wCDM cosmological parameters and galaxy HOD parameters. We obtain a 4.4 per cent measurement of S8 = 0.847 ± 0.037, in 3.5σ tension with the Planck cosmological results of 1.00 ± 0.02. We discuss the possibility of underestimated systematic uncertainties or astrophysical effects that could explain this discrepancy.},
doi = {10.1093/mnras/stz3423},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 2,
volume = 492,
place = {United Kingdom},
year = {2019},
month = {12}
}
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Bias and variance of angular correlation functions
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Clustering in real space and in redshift space
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The Spatial Distribution of Satellite Galaxies Within Halos: Measuring the very Small Scale Angular Clustering of sdss Galaxies
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