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Mapping the cosmic mass distribution with stacked weak gravitational lensing and Doppler lensing

Hossen, MR, Ema, SA, Bolejko, K ORCID: 0000-0001-7402-3836 and Lewis, GF 2021 , 'Mapping the cosmic mass distribution with stacked weak gravitational lensing and Doppler lensing' , Monthly Notices of the Royal Astronomical Society, vol. 509 , 5142–5154 , doi: https://doi.org/10.1093/mnras/stab3292.

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Abstract

Dark matter haloes represent the highest density peaks in the matter distribution. Conversely, cosmic voids are underdense patches of the universe. Probing the mass distribution of the universe requires various approaches, including weak gravitational lensing that subtly modifies the shape of distant sources, and Doppler lensing that changes the apparent size and magnitude of objects due to peculiar velocities. In this work, we adopt both gravitational and Doppler lensing effects to study the underlying matter distribution in and around cosmic voids or haloes. We use the relativistic N-body code gevolution, to generate the mass perturbations and develop a new ray-tracing code that relies on the design of the ray bundle method. We consider three categories of halo masses and void radii, and extract the cosmological information by stacking weak-lensing and Doppler lensing signals around voids or haloes. The results of this paper show that the most optimal strategy that combines both gravitational and Doppler lensing effects to map the mass distribution should focus on the redshift range

Item Type: Article
Authors/Creators:Hossen, MR and Ema, SA and Bolejko, K and Lewis, GF
Keywords: gravitational lensing: weak – methods: numerical – dark matter – large-scale structure of Universe.
Journal or Publication Title: Monthly Notices of the Royal Astronomical Society
Publisher: Blackwell Publishing Ltd
ISSN: 0035-8711
DOI / ID Number: https://doi.org/10.1093/mnras/stab3292
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