Cosmological constraints from the tomographic cross-correlation of DESI Luminous Red Galaxies and Planck CMB lensing
| Autor: | Martin White, Rongpu Zhou, Joseph DeRose, Simone Ferraro, Shi-Fan Chen, Nickolas Kokron, Stephen Bailey, David Brooks, Juan García-Bellido, Julien Guy, Klaus Honscheid, Robert Kehoe, Anthony Kremin, Michael Levi, Nathalie Palanque-Delabrouille, Claire Poppett, David Schlegel, Gregory Tarle |
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| Přispěvatelé: | UAM. Departamento de Física Teórica |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Gravitational Lensing
Cosmology and Nongalactic Astrophysics (astro-ph.CO) gravitational lensing cosmological parameters from CMBR Molecular FOS: Physical sciences Física Astronomy and Astrophysics cosmological parameters from LSS Astrophysics::Cosmology and Extragalactic Astrophysics Atomic Nuclear & Particles Physics Particle and Plasma Physics Cosmological Parameters from CMBR Nuclear redshift surveys Astrophysics::Galaxy Astrophysics Astronomical and Space Sciences Cosmological Parameters from LSS Astrophysics - Cosmology and Nongalactic Astrophysics Redshift Surveys |
| Zdroj: | Journal of Cosmology and Astroparticle Physics, vol 2022, iss 02 |
| Popis: | We use luminous red galaxies selected from the imaging surveys that are being used for targeting by the Dark Energy Spectroscopic Instrument (DESI) in combination with CMB lensing maps from the Planck collaboration to probe the amplitude of large-scale structure over $0.4\le z\le 1$. Our galaxy sample, with an angular number density of approximately $500\,\mathrm{deg}^{-2}$ over 18,000 sq.deg., is divided into 4 tomographic bins by photometric redshift and the redshift distributions are calibrated using spectroscopy from DESI. We fit the galaxy autospectra and galaxy-convergence cross-spectra using models based on cosmological perturbation theory, restricting to large scales that are expected to be well described by such models. Within the context of $\Lambda$CDM, combining all 4 samples and using priors on the background cosmology from supernova and baryon acoustic oscillation measurements, we find $S_8=\sigma_8(\Omega_m/0.3)^{0.5}=0.73\pm 0.03$. This result is lower than the prediction of the $\Lambda$CDM model conditioned on the Planck data. Our data prefer a slower growth of structure at low redshift than the model predictions, though at only modest significance. Comment: 44 pages, 16 figures. Matches version accepted by journal: more details on analysis, updated references, link to data added |
| Databáze: | OpenAIRE |
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