Ruggeri, Rossana;
Blake, Chris;
Derose, Joseph;
Garcia-Quintero, C;
Hadzhiyska, B;
Ishak, M;
Jeffrey, N;
... DESI, Collaboration; + view all
(2023)
A data compression and optimal galaxy weights scheme for Dark Energy Spectroscopic Instrument and weak lensing data sets.
Monthly Notices of the Royal Astronomical Society
, 525
(3)
pp. 3865-3878.
10.1093/mnras/stad1651.
Preview |
PDF
stad1651.pdf - Published Version Download (2MB) | Preview |
Abstract
Combining different observational probes, such as galaxy clustering and weak lensing, is a promising technique for unveiling the physics of the Universe with upcoming dark energy experiments. The galaxy redshift sample from the Dark Energy Spectroscopic Instrument (DESI) will have a significant overlap with major ongoing imaging surveys specifically designed for weak lensing measurements: The Kilo-Degree Survey (KiDS), the Dark Energy Survey (DES), and the Hyper Suprime-Cam (HSC) survey. In this work, we analyse simulated redshift and lensing catalogues to establish a new strategy for combining high-quality cosmological imaging and spectroscopic data, in view of the first-year data assembly analysis of DESI. In a test case fitting for a reduced parameter set, we employ an optimal data compression scheme able to identify those aspects of the data that are most sensitive to cosmological information and amplify them with respect to other aspects of the data. We find this optimal compression approach is able to preserve all the information related to the growth of structures.
| Type: | Article |
|---|---|
| Title: | A data compression and optimal galaxy weights scheme for Dark Energy Spectroscopic Instrument and weak lensing data sets |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stad1651 |
| Publisher version: | https://doi.org/10.1093/mnras/stad1651 |
| Language: | English |
| Additional information: | © 2023 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | gravitational lensing: weak, methods: statistical, large-scale structure of Universe, cosmology: observations |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10179645 |
Archive Staff Only
 |
View Item |
