Small-scale Effects of Thermal Inflation on Halo Abundance at High-$z$, Galaxy Substructure Abundance and 21-cm Power Spectrum

Abstract

We study the impact of thermal inflation on the formation of cosmological structures and present astrophysical observables which can be used to constrain and possibly probe the thermal inflation scenario. These are dark matter halo abundance at high redshifts, satellite galaxy abundance in the Milky Way, and fluctuation in the 21-cm radiation background before the epoch of reionization. The thermal inflation scenario leaves a characteristic signature on the matter power spectrum by boosting the amplitude at a specific wavenumber determined by the number of e-foldings during thermal inflation ($N_{\mathrm{bc}}$), and strongly suppressing the amplitude for modes at smaller scales. For a reasonable range of parameter space, one of the consequences is the suppression of minihalo formation at high redshifts and that of satellite galaxies in the Milky Way. While this effect is substantial, it is degenerate with other cosmological or astrophysical effects. The power spectrum of the 21-cm background probes this impact more directly, and its observation may be the best way to constrain the thermal inflation scenario due to the characteristic signature in the power spectrum. The Square Kilometre Array (SKA) in phase 1 (SKA1) has sensitivity large enough to achieve this goal for models with $N_{\mathrm{bc}}\gtrsim 26$ if a 10000-hr observation is performed. The final phase SKA, with anticipated sensitivity about an order of magnitude higher, seems more promising and will cover a wider parameter space.

arXiv comment28 pages, 8 figures

References in corpus (67)

• Planck 2015 results. XIII. Cosmological parameters
• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Efficient Computation of CMB anisotropies in closed FRW models
• Dark Matter Substructure in Galactic Halos
• Large scale bias and the peak background split
• The James Webb Space Telescope
• Toward a halo mass function for precision cosmology: the limits of universality
• Planck 2013 results. XXII. Constraints on inflation
• 21-cm cosmology
• Cosmological Simulations with Self-Interacting Dark Matter I: Constant Density Cores and Substructure
• The Milky Way's bright satellites as an apparent failure of LCDM
• Beyond LISA: Exploring Future Gravitational Wave Missions
• The tumultuous lives of galactic dwarfs and the missing satellites problem
• Model Independent Properties and Cosmological Implications of the Dilaton and Moduli Sectors of 4-d Strings
• Cosmological Implications of Dynamical Supersymmetry Breaking
• CMB power spectrum parameter degeneracies in the era of precision cosmology
• Thermal Inflation and the Moduli Problem
• The properties of warm dark matter haloes
• Cosmological Parameter Estimation Using 21 cm Radiation from the Epoch of Reionization
• The Milky Way's circular velocity curve between 4 and 14 kpc from APOGEE data
• The evolution of CMB spectral distortions in the early Universe
• How accurately can 21 cm tomography constrain cosmology?
• A fitting formula for the merger timescale of galaxies in hierarchical clustering
• Cosmology with a TeV mass GUT Higgs
• A Method for Separating the Physics from the Astrophysics of High-Redshift 21cm Fluctuations
• PINOCCHIO: pinpointing orbit-crossing collapsed hierarchical objects in a linear density field
• Improved constraints on the primordial power spectrum at small scales from ultracompact minihalos
• CMB at 2x2 order: the dissipation of primordial acoustic waves and the observable part of the associated energy release
• Lyman-alpha Forests cool Warm Dark Matter
• Generalised constraints on the curvature perturbation from primordial black holes
• Constraints on the Dark Matter Particle Mass from the Number of Milky Way Satellites
• Self-regulated reionization
• Solving the Cosmological Moduli Problem with Weak Scale Inflation
• The Global 21-cm Signal in the Context of the High-z Galaxy Luminosity Function
• The population of Milky Way satellites in the LambdaCDM cosmology
• Redshift Space Distortion of the 21cm Background from the Epoch of Reionization I: Methodology Re-examined
• Detecting the Rise and Fall of the First Stars by Their Impact on Cosmic Reionization
• 21-cm Background Anisotropies Can Discern Primordial Non-Gaussianity
• Hints on the Nature of Dark Matter from the Properties of Milky Way Satellites
• Affleck-Dine Baryogenesis after Thermal Inflation
• SCORCH I: The Galaxy-Halo Connection in the First Billion Years
• Model independent analysis of dark matter points to a particle mass at the keV scale
• Horizon Run 4 Simulation: Coupled Evolution of Galaxies and Large-scale Structures of the Universe
• The mass of the dark matter particle from theory and observations
• Cosmological constraints from the redshift dependence of the Alcock-Paczynski effect: application to the SDSS-III BOSS DR12 galaxies
• Effects of Early Cosmic Reionization on the Substructure Problem in Galactic Halo
• Warm dark matter primordial spectra and the onset of structure formation at redshift z
• Modular Cosmology, Thermal Inflation, Baryogenesis and Predictions for Particle Accelerators
• Thermal inflation, baryogenesis and axions
• Gas in Simulations of High Redshift Galaxies and Minihalos
• Thermal Inflation and the Gravitational Wave Background
• The Most Bound Halo Particle-Galaxy Correspondence Model: Comparison between Models with Different Merger Timescales
• Cosmological Lower Bound on Dark Matter Masses from the Soft Gamma-ray Background
• Preheating and Affleck-Dine leptogenesis after thermal inflation
• Late-time Affleck-Dine baryogenesis after thermal inflation
• Modelling Inflation with a Power-law Approach to the Inflationary Plateau
• Constraining the primordial power spectrum from SNIa lensing dispersion
• CMB Spectral Distortion Constraints on Thermal Inflation
• Effects of thermal inflation on small scale density perturbations
• Early cosmology and the stochastic gravitational wave background
• Cosmology from the Highly-Redshifted 21 cm Line
• Optimal core baseline design and observing strategy for probing the astrophysics of reionization with the SKA
• Two-dimensional Topology of Cosmological Reionization
• Cosmological moduli problem in large volume scenario and thermal inflation
• Topology of Large-Scale Structures of Galaxies in Two Dimensions - Systematic Effects
• How Thermal Inflation can save Minimal Hybrid Inflation in Supergravity
• Thermal Inflation with a Thermal Waterfall Scalar Field Coupled to a Light Spectator Scalar Field

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