Spherical Collapse Approach for Non-standard Dark Matter Models and Enhanced Early Galaxy Formation in JWST

Abstract

Using the spherical collapse approach, we investigate the impact of two alternative dark matter models, each characterized by distinct non-zero equations of state, one constant and the other time dependent on the nonlinear regime. Specifically, we compare these models to standard cold dark matter (CDM) by analyzing their influence on the linear density threshold for nonrelativistic component collapse and virial overdensity. Additionally, we explore the number count of collapsed objects, or dark matter halos, analogous to the number count of galaxy clusters. Finally, in light of recent discoveries by the James Webb Space Telescope (JWST), indicating the potential for more efficient early galaxy formation at higher redshifts, we investigate how alternative dark matter assumptions can enhance structure formation efficiency during the early universe.

11 pages, 10 figures

References in corpus (30)

• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• Large scale bias and the peak background split
• The Complete Light-curve Sample of Spectroscopically Confirmed Type Ia Supernovae from Pan-STARRS1 and Cosmological Constraints from The Combined Pantheon Sample
• Accelerating Universes with Scaling Dark Matter
• Planck 2018 results. I. Overview and the cosmological legacy of Planck
• A 6% measurement of the Hubble parameter at $z\sim 0.45$: direct evidence of the epoch of cosmic re-acceleration
• Conservative Constraints on Early Cosmology: an illustration of the Monte Python cosmological parameter inference code
• A population of red candidate massive galaxies ~600 Myr after the Big Bang
• The Cosmic Linear Anisotropy Solving System (CLASS) IV: Efficient implementation of non-cold relics
• Stress Testing $\Lambda$CDM with High-redshift Galaxy Candidates
• The brightest galaxies at Cosmic Dawn
• Physical approximations for the nonlinear evolution of perturbations in dark energy scenarios
• Spherical collapse model in dark energy cosmologies
• Did JWST observe imprints of axion miniclusters or primordial black holes?
• Primordial power spectrum in light of JWST observations of high redshift galaxies
• Effects of shear and rotation on the spherical collapse model for clustering dark energy
• The spherical collapse model and cluster formation beyond the $\Lambda$ cosmology: Indications for a clustered dark energy?
• High-redshift JWST Observations and Primordial Non-Gaussianity
• Light Curve Model for Luminous Red Novae and Inferences about the Ejecta of Stellar Mergers
• An extensive investigation of the Generalised Dark Matter model
• Structure Formation in Modified Gravity Scenarios
• Early Structure Formation from Cosmic String Loops in Light of Early JWST Observations
• On the implementation of the spherical collapse model for dark energy models
• Fuzzy Dark Matter as a Solution to Reconcile the Stellar Mass Density of High-z Massive Galaxies and Reionization History
• Exploring the Dark Universe: constraints on dynamical Dark Energy models from CMB, BAO and growth rate measurements
• Spherical collapse model and cluster number counts in power law $f(T)$ gravity
• Spherical collapse in the extended quintessence cosmological models
• Calculation of the critical overdensity in the spherical-collapse approximation
• Can decaying dark matter scenarios alleviate both $H_0$ and ${\sigma }_8$ tensions?
• Spherical collapse in Generalized Dark Matter models

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• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Evolving Dark Energy or Evolving Dark Matter?
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• Can an Anti-de Sitter Vacuum in the Dark Energy Sector Explain JWST High-Redshift Galaxy and Reionization Observations?
• High-redshift Galaxies from JWST Observations in More Realistic Dark Matter Halo Models
• Dark Secrets of Baryons: Illuminating Dark Matter-Baryon Interactions with JWST