ORIGINAL RESEARCH article
Front. Astron. Space Sci.
Sec. Extragalactic Astronomy
Volume 12 - 2025 | doi: 10.3389/fspas.2025.1607031
This article is part of the Research TopicAdvancing Emission Line Intensity Mapping: Methodologies, Models, and InstrumentationView all articles
Probing cosmic voids with emission line galaxies
Provisionally accepted
- The University of Tokyo, Bunkyo, Japan
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We use a set of cosmological simulations to make forecasts for future line intensity mapping (LIM) observations and galaxy redshift surveys. We focus on low-density cosmic voids, and study how their physical properties depend on observational methods for void detection and identification. We first generate mock intensity maps targeted to the far-infrared CO(3-2) emission line. We assign the CO(3-2) line luminosity to galaxies populated in the cosmological simulations.We then use a popular void finder VIDE and measure the physical properties of voids, and calculate the basic statistics. We consider three-dimensional voids detected from galaxy redshift surveys and then those identified in two-dimensional intensity maps corresponding to a single frequency bin at 173GHz. Void size functions and radial density profiles show characteristic features that can be used to probe cosmology as well as the nature of the emission line galaxies.Finally, we discuss the future prospect for cosmology using joint analysis of LIM and galaxy surveys.
Keywords: cosmology, Galaxies, large-scale structure, statistics, redshift surveys
Received: 07 Apr 2025; Accepted: 14 May 2025.
Copyright: © 2025 Yamada and Yoshida. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Naoki Yoshida, The University of Tokyo, Bunkyo, Japan
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