Journal article
Testing General Relativity on cosmological scales at redshift z ∼ 1.5 with quasar and CMB lensing
- Zhang, Yucheng ORCID Center for Cosmology and Particle Physics, Department of Physics, New York University, 726 Broadway, New York, NY 10003, USA
- Pullen, Anthony R Center for Computational Astrophysics, Flatiron Institute, New York, NY 10010, USA
- Alam, Shadab Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ, UK
- Singh, Sukhdeep Berkeley Center for Cosmological Physics, University of California, Berkeley, CA 94720, USA
- Burtin, Etienne IRFU,CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- Chuang, Chia-Hsun Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, CA 94305, USA
- Hou, Jiamin Max-Planck-Institut für Extraterrestrische Physik, Postfach 1312, Giessenbachstrasse 1, 85748 Garching bei München, Germany
- Lyke, Brad W University of Wyoming, 1000 E. University Ave., Laramie, WY 82071, USA
- Myers, Adam D University of Wyoming, 1000 E. University Ave., Laramie, WY 82071, USA
- Neveux, Richard IRFU,CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- Ross, Ashley J ORCID Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, Ohio, USA
- Rossi, Graziano Department of Physics and Astronomy, Sejong University, Seoul, 143-747, Korea
- Zhao, Cheng ORCID Institute of Physics, Laboratory of Astrophysics, École Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, 1290 Versoix, Switzerland
- 2020-11-25
Published in:
- Monthly Notices of the Royal Astronomical Society. - Oxford University Press (OUP). - 2020
English
Abstract
We test general relativity (GR) at the effective redshift $\bar{z} \sim 1.5$ by estimating the statistic EG, a probe of gravity, on cosmological scales 19 − 190 h−1Mpc. This is the highest-redshift and largest-scale estimation of EG so far. We use the quasar sample with redshifts 0.8 < z < 2.2 from Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey (eBOSS) Data Release 16 (DR16) as the large-scale structure (LSS) tracer, for which the angular power spectrum $C_\ell ^{qq}$ and the redshift-space distortion (RSD) parameter β are estimated. By cross correlating with the Planck 2018 cosmic microwave background (CMB) lensing map, we detect the angular cross-power spectrum $C_\ell ^{\kappa q}$ signal at 12 σ significance. Both jackknife resampling and simulations are used to estimate the covariance matrix (CM) of EG at 5 bins covering different scales, with the later preferred for its better constraints on the covariances. We find EG estimates agree with the GR prediction at 1 σ level over all these scales. With the CM estimated with 300 simulations, we report a best-fit scale-averaged estimate of $E_G(\bar{z})=0.30\pm 0.05$, which is in line with the GR prediction $E_G^{\rm GR}(\bar{z})=0.33$ with Planck 2018 CMB+BAO matter density fraction Ωm = 0.31. The statistical errors of EG with future LSS surveys at similar redshifts will be reduced by an order of magnitude, which makes it possible to constrain modified gravity models.
- Language
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- English
- Open access status
- closed
- Identifiers
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- DOI 10.1093/mnras/staa3672
- ISSN 0035-8711
- Persistent URL
- https://sonar.ch/global/documents/80025
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