Quantifying the power spectrum of small-scale structure in semi-analytic galaxies

Abstract

In the cold dark matter (CDM) picture of structure formation, galaxy mass distributions are predicted to have a considerable amount of structure on small scales. Strong gravitational lensing has proven to be a useful tool for studying this small-scale structure. Much of the attention has been given to detecting individual dark matter subhalos through lens modeling, but recent work has suggested that the full population of subhalos could be probed using a power spectrum analysis. In this paper we quantify the power spectrum of small-scale structure in simulated galaxies, with the goal of understanding theoretical predictions and setting the stage for using measurements of the power spectrum to test dark matter models. We use a sample of simulated galaxies generated from the \texttt{Galacticus} semi-analytic model to determine the power spectrum distribution first in the CDM paradigm and then in a warm dark matter scenario. We find that a measurement of the slope and amplitude of the power spectrum on galaxy strong lensing scales ($k\sim 1$ kpc${}^{-1}$) could be used to distinguish between CDM and alternate dark matter models, especially if the most massive subhalos can be directly detected via gravitational imaging.

arXiv comment8 pages, 10 figures

References in corpus (63)

• The Average Star Formation Histories of Galaxies in Dark Matter Halos from z=0-8
• The Aquarius Project: the subhalos of galactic halos
• Resolving Cosmic Structure Formation with the Millennium-II Simulation
• Reionization and the abundance of galactic satellites
• Direct Detection of CDM Substructure
• New Constraints on the free-streaming of warm dark matter from intermediate and small scale Lyman-$\alpha$ forest data
• Evidence for substructure in lens galaxies?
• The properties of warm dark matter haloes
• The Effects of Photoionization on Galaxy Formation - I: Model and Results at z=0
• Gravitational detection of a low-mass dark satellite at cosmological distance
• Compound gravitational lensing as a probe of dark matter substructure within galaxy halos
• Galacticus: A Semi-Analytic Model of Galaxy Formation
• ELVIS: Exploring the Local Volume in Simulations
• Detection of lensing substructure using ALMA observations of the dusty galaxy SDP.81
• Detection of a Dark Substructure through Gravitational Imaging
• Bayesian Strong Gravitational-Lens Modeling on Adaptive Grids: Objective Detection of Mass Substructure in Galaxies
• The Galaxy-Halo Connection Over The Last 13.3 Gyrs
• A Baryonic Solution to the Missing Satellites Problem
• Inference of the Cold Dark Matter substructure mass function at z=0.2 using strong gravitational lenses
• Constraints on neutrino masses from Lyman-alpha forest power spectrum with BOSS and XQ-100
• Analytic models of plausible gravitational lens potentials
• The number and size of subhalo-induced gaps in stellar streams
• Identifying Lenses with Small-Scale Structure. I. Cusp Lenses
• Detection of substructure with adaptive optics integral field spectroscopy of the gravitational lens B1422+231
• Linear perturbation theory for tidal streams and the small-scale CDM power spectrum
• Probing dark matter structure down to $10^7$ solar masses: flux ratio statistics in gravitational lenses with line of sight halos
• Modelling the line-of-sight contribution in substructure lensing
• Lensing substructure quantification in RXJ1131-1231: A 2 keV lower bound on dark matter thermal relic mass
• Analytic Cross Sections for Substructure Lensing
• The stellar-to-halo mass relation for Local Group galaxies
• Hints on the Nature of Dark Matter from the Properties of Milky Way Satellites
• Measuring the power spectrum of dark matter substructure using strong gravitational lensing
• Faint dwarfs as a test of DM models: WDM vs. CDM
• The statistics of the subhalo abundance of dark matter haloes
• Identifying Lenses with Small-Scale Structure. II. Fold Lenses
• Substructure and galaxy formation in the Copernicus Complexio warm dark matter simulations
• Halometry from Astrometry
• The Epoch of Reionization in Models with Reduced Small Scale Power
• Dark Matter Substructure Detection Using Spatially Resolved Spectroscopy of Lensed Dusty Galaxies
• Quantifying dwarf satellites through gravitational imaging: the case of SDSS J120602.09+514229.5
• Substructure in the lens HE 0435-1223
• SHARP - IV. An apparent flux ratio anomaly resolved by the edge-on disc in B0712+472
• Probing the nature of dark matter particles with stellar streams
• Probing the nature of dark matter by forward modeling flux ratios in strong gravitational lenses
• Detecting Dark Matter Substructures around the Milky Way with Gaia
• SHARP - II. Mass structure in strong lenses is not necessarily dark matter substructure: A flux ratio anomaly from an edge-on disc
• Flux-ratio anomalies from discs and other baryonic structures in the Illustris simulation
• Using gaps in N-body tidal streams to probe missing satellites
• Nonlinear evolution of dark matter subhalos and applications to warm dark matter
• A fresh look into the interacting dark matter scenario
• An observer's guide to the (Local Group) dwarf galaxies: predictions for their own dwarf satellite populations
• Detecting the disruption of dark-matter halos with stellar streams
• On the Power Spectrum of Dark Matter Substructure in Strong Gravitational Lenses
• Cold Dark Matter Substructures in Early-Type Galaxy Halos
• A Dark Census: Statistically Detecting the Satellite Populations of Distant Galaxies
• The inner mass power spectrum of galaxies using strong gravitational lensing: beyond linear approximation
• Astrometric Microlensing by Local Dark Matter Subhalos
• Probing the small-scale structure in strongly lensed systems via transdimensional inference
• Stellar Wakes from Dark Matter Subhalos
• Beyond subhalos: Probing the collective effect of the Universe's small-scale structure with gravitational lensing
• A robust mass estimator for dark matter subhalo perturbations in strong gravitational lenses
• Probing sub-galactic mass structure with the power spectrum of surface-brightness anomalies in high-resolution observations of galaxy-galaxy strong gravitational lenses. II.Observational constraints on the sub-galactic matter power spectrum
• Modeling GD-1 Gaps in a Milky-Way Potential

Cited by in corpus (20)

• Warm dark matter chills out: constraints on the halo mass function and the free-streaming length of dark matter with 8 quadruple-image strong gravitational lenses
• Mining for Dark Matter Substructure: Inferring subhalo population properties from strong lenses with machine learning
• From Images to Dark Matter: End-To-End Inference of Substructure From Hundreds of Strong Gravitational Lenses
• Deep Learning the Morphology of Dark Matter Substructure
• Direct Detection of Dark Matter Substructure in Strong Lens Images with Convolutional Neural Networks
• Quantifying the Line-of-Sight Halo Contribution to the Dark Matter Convergence Power Spectrum from Strong Gravitational Lenses
• Probing sub-galactic mass structure with the power spectrum of surface-brightness anomalies in high-resolution observations of galaxy-galaxy strong gravitational lenses. II.Observational constraints on the sub-galactic matter power spectrum
• Estimating the warm dark matter mass from strong lensing images with truncated marginal neural ratio estimation
• Extracting the Subhalo Mass Function from Strong Lens Images with Image Segmentation
• The lensing properties of subhaloes in massive elliptical galaxies in sterile neutrino cosmologies
• Astrophysical Tests of Dark Matter Self-Interactions
• Subhalo effective density slope measurements from HST strong lensing data with neural likelihood-ratio estimation
• Inferring subhalo effective density slopes from strong lensing observations with neural likelihood-ratio estimation
• Interlopers speak out: studying the dark universe using small-scale lensing anisotropies
• Science from an Ultra-Deep, High-Resolution Millimeter-Wave Survey
• Anisotropic strong lensing as a probe of dark matter self-interactions
• CMB-HD: An Ultra-Deep, High-Resolution Millimeter-Wave Survey Over Half the Sky
• Dark Matter Subhalos, Strong Lensing and Machine Learning
• Robustness of Neural Ratio and Posterior Estimators to Distributional Shifts for Population-Level Dark Matter Analysis in Strong Gravitational Lensing
• Probing Dark Matter with Strong Gravitational Lensing through an Effective Density Slope