Small-scale challenges to the λcdm paradigm
WebI combine numerical simulations, analytic models, and observations in my work. For more information, see my research page , publications, or CV (pdf). Some of the major … WebThe plane-of-satellites problem is one of the most severe small-scale challenges for the standard Λ cold dark matter (ΛCDM) cosmological model: Several dwarf galaxies around the Milky Way and Andromeda co-orbit in thin, planar structures. A similar case has been identified around the nearby elliptical galaxy Centaurus A (Cen A).
Small-scale challenges to the λcdm paradigm
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WebNov 20, 2024 · The ΛCDM paradigm, however, is facing several challenges on small scales (Kroupa 2015; Bullock & Boylan-Kolchin 2024 ), such as the unexpected phase-space correlation of satellite galaxies ("the satellite plane problem"; see, e.g., Kroupa et al. 2010; Müller et al. 2024) and the unexpected coupling in galaxies between the visible matter … WebSep 22, 2024 · The dark energy plus cold dark matter (ΛCDM) cosmological model has been a demonstrably successful framework for predicting and explaining the large-scale …
WebNov 1, 2024 · The small-scale challenges in contemporary cosmology consist in a handful of tensions between theoretical predictions and empirical evidence. Theoretical … WebIn the present paper, we will review the small-scale problems of the ΛCDM model, and we will discuss the proposed solutions and to what extent they are able to give us a theory …
Authors: Kevin Brand (1), Trienko L. Grobler (1), Waldo Kleynhans (2), Mattia Vaccari … WebJan 21, 2024 · Dwarf galaxies pose several challenges to the ΛCDM paradigm that have been extensively reviewed 10,11 ... and discusses only the small-scale ΛCDM challenges posed by gas emission-line observations.
WebJul 12, 2024 · PDF - Small-Scale Challenges to the $\Lambda$CDM Paradigm. PDF - The dark energy plus cold dark matter ($\Lambda$CDM) cosmological model has been a …
WebAbstract The dark energy plus cold dark matter (ΛCDM) cosmological model has been a demonstrably successful framework for predicting and explaining the large-scale … diamond\u0027s tzWebThe number of small galaxies and dwarf satellites in the Local Group is also far below the predicted count of low-mass dark matter halos and subhalos within similar volumes. … cissoko soundersWebThe dark energy plus cold dark matter (CDM) cosmological model has been a demonstrably successful framework for predicting and explaining the large-scale structure of Universe … cissna park schoolsWebJul 27, 2024 · Using Planck 2024 CMB (TT+TE+EE+lensing) alone, best fits predict those parameters to be almost identical to ΛCDM, with slightly smaller χ 2min. The resulting H0 =72.24 ± 0.64 km/s/Mpc, which virtually alleviates the tension with local measurements, due to late time phantom behaviour. diamond\\u0027s vfWebSmall-Scale Challenges to the CDM Paradigm James S. Bullock1 and Michael Boylan-Kolchin2 1Department of Physics and Astronomy, University of California, Irvine, CA … cissokho quevillyWebMay 17, 2024 · A bstract. String theory has been claimed to give rise to natural fuzzy dark matter candidates in the form of ultralight axions. In this paper we revisit this claim by a detailed study of how moduli stabilisation affects the masses and decay constants of different axion fields which arise in type IIB flux compactifications. diamond\\u0027s victoryWebJun 24, 2016 · In the present paper, we will review the small scale problems of the $\Lambda$CDM model, we will discuss the proposed solutions and to what extent they are able to give us a theory accurately... diamond\u0027s vh