Abstract
We report the first detection of the dark matter distribution around Lyman break galaxies (LBGs) at high redshift through the cosmic microwave background (CMB) lensing measurements with the public Planck PR3 map. The LBG sample consists of 1 473 106 objects with the median redshift of that are identified in a total area of observed by the Hyper Suprime-Cam Strategic Survey Program survey. After careful investigations of systematic uncertainties, such as contamination from foreground galaxies and cosmic infrared background, we obtain the significant detection of the CMB lensing signal at that is dominated by 2-halo term signals of the LBGs. Fitting a simple model consisting of the Navarro-Frenk-White profile and the linear-bias model, we obtain the typical halo mass of . Combining the CMB lensing and galaxy-galaxy clustering signals on the large scales, we demonstrate the first cosmological analysis at that constrains . We find that our constraint on is roughly consistent with the Planck cosmology, while this constraint is lower than the Planck cosmology over the level. This study opens up a new window for constraining cosmological parameters at high redshift by the combination of CMB and high- galaxies, as well as studying the interplay between galaxy evolution and large-scale structure at such high redshift, by upcoming CMB and optical and near-infrared imaging surveys.
- Received 31 March 2021
- Revised 21 March 2022
- Accepted 9 May 2022
DOI:https://doi.org/10.1103/PhysRevLett.129.061301
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
Published by the American Physical Society
Physics Subject Headings (PhySH)
Viewpoint
Dark Matter Mapped Around Distant Galaxies
Published 1 August 2022
Gravitational lensing of the cosmic microwave background has been used to probe the distribution of dark matter around some of the earliest galaxies in the Universe.
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