The Large-Scale Structure of the Universe: Dark and Luminous Matters

A special issue of Galaxies (ISSN 2075-4434).

Deadline for manuscript submissions: closed (10 November 2022) | Viewed by 1621

Special Issue Editors


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Guest Editor
Physics Department, ETSIAE, Universidad Politecnica de Madrid, Plaza Cardenal Cisneros 3, E-28040 Madrid, Spain
Interests: dark matter structure and evolution; galaxy clusters
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
PDRA at IfA, University of Edinburgh, Old College, South Bridge, Edinburgh EH8 9YL, UK
Interests: large-scale structure; galaxy clusters; alternative cosmology models

Special Issue Information

Dear Colleagues,

The large-scale structure of the universe results from the gravitational clustering of matter, which is dominated by dark matter (~84%) with the ordinary matter only occupying about 16% under the standard LCDM model. Matter assembles under gravitational attraction to form gravitationally-bound structures—halos, of which the largest one formed the last under the hierarchical structure formation. On a large scale, matter distributes in four different patterns: very dense nodes, filaments that connect nodes to form web-like structures, sheets (wall-like structures), and the lowest density regions of voids. Now we avail excellent data to test the theory. On one hand, we have observational galaxy data (2dFGRS, SDSS, etc.), and on the other hand we have numerical simulations, which have evolved to such a stage that is possible to simulate both the dark and the baryonic matters down to galactic-scale resolution.

Despite the coined expression of “precision cosmology”, there are many open questions in the standard theory of large-scale structure that have no precise answers, especially at the point where theory meets observation. In this Special Issue, we want to focus on the distributions of luminous and dark matters from low to high redshift, as well as the connections between the two. More importantly, does the theory predict what we observe?

Prof. Dr. Jose Gaite
Dr. Weiguang Cui
Guest Editors

Manuscript Submission Information

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Keywords

  • luminous and dark matters
  • large-scale structure
  • observational cosmology
  • data analysis and numerical simulations

Published Papers (1 paper)

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Research

12 pages, 366 KiB  
Article
Explaining the Hardening Structures of Helium Spectrum and Boron to Carbon Ratio through Different Propagation Models
by Qing Luo, Jie Feng and Pak-Hin Thomas Tam
Galaxies 2023, 11(2), 43; https://doi.org/10.3390/galaxies11020043 - 08 Mar 2023
Cited by 1 | Viewed by 1302
Abstract
Recently, a series of high-precision measurements by various experiments show that cosmic ray nuclei spectra begin to harden at ∼200 GV and the boron-to-carbon (B/C) ratio has a similar trend around the same energy. These anomalous structures possibly result from the journey of [...] Read more.
Recently, a series of high-precision measurements by various experiments show that cosmic ray nuclei spectra begin to harden at ∼200 GV and the boron-to-carbon (B/C) ratio has a similar trend around the same energy. These anomalous structures possibly result from the journey of cosmic rays (CRs) from their sources to our solar system, which has important implications for our understanding of the origin and propagation of Galactic cosmic rays (GCRs). In this work, we investigate several propagation models and attempt to explain these anomalous observations. We have verified that an extension of the traditional propagation model taking into account spatially dependent propagation and secondary particle acceleration provides a more accurate description of the latest B/C ratio and the Helium flux data measured by DAMPE, CALET, and AMS-02. Full article
(This article belongs to the Special Issue The Large-Scale Structure of the Universe: Dark and Luminous Matters)
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