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Top-down fragmentation of a warm dark matter filament
Published 2003“…In a previous paper, we showed that warm dark matter (WDM) differs from the standard cold dark matter (CDM) mainly in the formation history and large-scale distribution of low-mass haloes, which form later and tend to be more clustered in WDM than in CDM universes, tracing the filamentary structures of the cosmic web more closely. …”
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103
A search for ultra-light axions using precision cosmological data
Published 2014“….="" used="" using="" well="" wigglez="" wilkinson="" work,=""> 10^{-24} eV, ULAs are indistinguishable from standard cold dark matter on the length scales probed, and are thus allowed by these data. …”
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104
Impact of Collisional Matter on the Late-Time Dynamics of f(R,T) Gravity
Published 2018-10-01“…We study the cosmic evolution in the presence of collisional matter, and we compare the results with those corresponding to non-collisional matter and the Λ -cold-dark-matter ( Λ CDM) model. Particularly, for a flat Friedmann–Lema i ^ tre–Robertson–Walker Universe, we study two non-minimally coupled f ( R , T ) gravity models and we focus our study on the late-time dynamical evolution of the model. …”
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105
Constraining Neutrino Cosmologies with Nonlinear Reconstruction
Published 2024-01-01“…By applying nonlinear reconstruction to cold dark matter fields from the Quijote simulations, we find that nonlinear reconstruction can improve the constraints on cosmological parameters significantly, nearly reaching the linear theory limit. …”
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106
Homogeneous and anisotropic cosmologies with affine EoS: a dynamical system perspective
Published 2023-08-01“…The LRS BI, BIII and BV geometry based dynamical systems exhibit $$r=1,s=0$$ r = 1 , s = 0 $$(\Lambda $$ ( Λ cold dark matter model) at late-times, which is compatible with the observations. …”
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107
Assessment of Dark Matter Models Using Dark Matter Correlations across Dwarf Spheroidal Galaxies
Published 2022-07-01“…Second, for the sake of comparison with the standard cold dark matter, we also compute the correlations between dark matter mass densities in a small halo of the Eagle hydrodynamics simulation. …”
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108
Alleviating both H0 and S8 tensions: Early dark energy lifts the CMB-lockdown on ultralight axion
Published 2023-04-01“…We show that the inclusion of early dark energy (EDE) will lift the CMB-lockdown on such ULA, and possibly other forms of dark matter beyond cold dark matter. By performing Monte Carlo Markov Chain analysis, it is found that, as opposed to ΛCDM, the AdS-EDE cosmology (with an Anti-de Sitter phase around recombination) now allows the existence of axion with mass 10−26 eV and predicts 6% of the matter in our Universe to be such ULA, which can also help alleviating the S8 tension in EDE.…”
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109
Gravitational ringing and superradiant instabilities of the Kerr-like black holes in a dark matter halo
Published 2023-07-01“…We consider these gravitational ringring of black holes both in cold dark matter (CDM) model and scalar field dark matter (SFDM) model at the LSB galaxy, and compare them with Kerr black hole. …”
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110
Physics potential of the International Axion Observatory (IAXO)
Published 2022“…Endowed with a sensitivity to discover axion-like particles (ALPs) with a coupling to photons as small as gaγ∼ 10-12 GeV-1, or to electrons gae∼10-13, IAXO has the potential to find the QCD axion in the 1 meV∼1 eV mass range where it solves the strong CP problem, can account for the cold dark matter of the Universe and be responsible for the anomalous cooling observed in a number of stellar systems. …”
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111
The 2dF galaxy redshift survey: Voids and hierarchical scaling models
Published 2004“…Conversely, the reduced VPF for dark matter in a A cold dark matter ( ACDM) universe does appear to be lognormal on small scales but deviates significantly beyond ∼4 h -1 Mpc. …”
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112
Search for boosted dark matter interacting with electrons in Super-Kamiokande
Published 2018“…Limits are also calculated for a baseline model of boosted dark matter produced from cold dark matter annihilation or decay. This is the first experimental search for boosted dark matter from the Galactic center or the Sun interacting in a terrestrial detector.…”
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113
Constraints on Cosmological Parameters from MAXIMA-1
Published 2000“…We find constraints on the total energy density of the universe, \Omega=1.0^{+0.15}_{-0.30}, the physical density of baryons, \Omega_{b}h^2=0.03 +/- 0.01, the physical density of cold dark matter, \Omega_{cdm}h^2=0.2^{+0.2}_{-0.1}$, and the spectral index of primordial scalar fluctuations, n_s=1.08+/-0.1, all at the 95% confidence level. …”
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114
Top-down fragmentation of a warm dark matter filament
Published 2003“…In a previous paper, we showed that warm dark matter (WDM) differs from the standard cold dark matter (CDM) mainly in the formation history and large-scale distribution of low-mass haloes, which form later and tend to be more clustered in WDM than in CDM universes, tracing the filamentary structures of the cosmic web more closely. …”
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115
Hierarchical formation of bulgeless galaxies: Why outflows have low angular momentum
Published 2011“…Using high resolution, fully cosmological smoothed particle hydrodynamical simulations of dwarf galaxies in a Lambda cold dark matter Universe, we show how high redshift gas outflows can modify the baryon angular momentum distribution and allow pure disc galaxies to form. …”
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116
Black holes, cuspy atmospheres and galaxy formation.
Published 2005“…Working in tandem, these mechanisms can probably explain the profound difference between the galaxy luminosity function and the mass function of dark haloes expected in the cold dark matter cosmology.…”
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Measuring the transition to homogeneity with photometric redshift surveys
Published 2014“…We have also studied the influence of the redshift bin width, photometric redshift errors, bias, non-linear clustering, and surveyed area on the angular homogeneity index H2(θ) in a Λ cold dark matter cosmology. The level to which an upcoming galaxy survey will be able to constrain the transition to homogeneity will depend mainly on the total surveyed area and the compactness of the surveyed region. …”
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High angular momentum halo gas: a feedback and code-independent prediction of LCDM
Published 2017“…Due to the qualitative agreement among disparate simulations, we conclude that the buildup of high angular momentum halo gas and the presence of these inspiraling cold streams are robust predictions of Lambda Cold Dark Matter galaxy formation, though the detailed morphology of these streams is significantly less certain. …”
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A filament of dark matter between two clusters of galaxies.
Published 2012“…It is a firm prediction of the concordance cold-dark-matter cosmological model that galaxy clusters occur at the intersection of large-scale structure filaments. …”
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Impact of the Universe's expansion rate on constraints on modified growth of structure
Published 2022“…We do so by considering the background of a flat, Λ cold dark matter universe, a universe with a more general equation of state for the dark energy, and finally, a general, model-independent, expansion rate. …”
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