A dense dark matter core of the subhalo in the strong lensing system JVAS B1938+666

Abstract

The nature of dark matter remains unknown, motivating the study of fuzzy/wave dark matter (FDM/$\psi$DM) and self-interacting dark matter (SIDM) as alternative frameworks to address small-scale discrepancies in halo profiles inferred from observations. This study presents a non-parametric reconstruction of the mass distribution of the previously-found, dark subhalo in the strong-lensing system JVAS B1938+666. Compared with the standard Navarro-Frenk-White (NFW) profile, both SIDM and $\psi$DM ($m_{\psi }=1.32_{-0.31}^{+0.22}\times 10^{-22}\mathrm{eV}$) provide significantly better fits to the resulting density profile. Moreover, the SIDM model is favored over $\psi$DM with a Bayes factor of 14.44. The reconstructed density profile features a characteristic kiloparsec-scale core ($r_c\approx 0.5\mathrm{kpc}$) with central density ${\rho }_c\approx 2.5\times 10^7{\mathrm{M}}_{\odot }\mathrm{kp}{\mathrm{c}}^{-3}$, exhibiting remarkable consistency with the core-halo mass scaling relations observed in Local Group dwarf spheroidals. These findings offer insights that may help address the core-cusp discrepancy in $\Lambda$CDM substructure predictions.

arXiv commentPublished in ApJL, Volume 991, Number 1, updated Appendix A.2 Eq.(A8) tidal truncated profile

References in corpus (66)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• Astropy: A Community Python Package for Astronomy
• emcee: The MCMC Hammer
• Planck 2015 results. XIII. Cosmological parameters
• The Structure of Cold Dark Matter Halos
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• Observational evidence for self-interacting cold dark matter
• Cold and Fuzzy Dark Matter
• Small-Scale Challenges to the $\Lambda$CDM Paradigm
• Dark Matter Candidates from Particle Physics and Methods of Detection
• Dark Matter Self-interactions and Small Scale Structure
• At the heart of the matter: the origin of bulgeless dwarf galaxies and Dark Matter cores
• Cosmic Structure as the Quantum Interference of a Coherent Dark Wave
• Response of dark matter halos to condensation of baryons: cosmological simulations and improved adiabatic contraction model
• How supernova feedback turns dark matter cusps into cores
• Understanding the Core-Halo Relation of Quantum Wave Dark Matter, $\psi$DM, from 3D Simulations
• First constraints on fuzzy dark matter from Lyman-$\alpha$ forest data and hydrodynamical simulations
• Dark matter and cosmic structure
• Gravitational detection of a low-mass dark satellite at cosmological distance
• Wave Dark Matter
• Fluid Dark Matter
• The Impact of Baryonic Physics on the Structure of Dark Matter Halos: the View from the FIRE Cosmological Simulations
• Galaxy Formation with BECDM: I. Turbulence and relaxation of idealised haloes
• Strong bound on canonical ultra-light axion dark matter from the Lyman-alpha forest
• Cold dark matter heats up
• Detection of a Dark Substructure through Gravitational Imaging
• NIHAO IV: Core creation and destruction in dark matter density profiles across cosmic time
• The distribution of dark matter in galaxies
• A mass-dependent density profile for dark matter haloes including the influence of galaxy formation
• How the Self-Interacting Dark Matter Model Explains the Diverse Galactic Rotation Curves
• A Model For Halo Formation With Axion Mixed Dark Matter
• Dark Matter: A Primer
• Information field theory for cosmological perturbation reconstruction and non-linear signal analysis
• Tying Dark Matter to Baryons with Self-interactions
• A dark matter profile to model diverse feedback-induced core sizes of $\Lambda$CDM haloes
• A Quantitative Study of Interacting Dark Matter in Halos
• Reconciling the Diversity and Uniformity of Galactic Rotation Curves with Self-Interacting Dark Matter
• Baryonic clues to the puzzling diversity of dwarf galaxy rotation curves
• Einstein rings modulated by wavelike dark matter from anomalies in gravitationally lensed images
• Variable structures in M87* from space, time and frequency resolved interferometry
• The diverse dark matter density at sub-kiloparsec scales in Milky Way satellites:implications for the nature of dark matter
• Quantifying dwarf satellites through gravitational imaging: the case of SDSS J120602.09+514229.5
• Inert Higgs Dark Matter for CDF-II W-boson Mass and Detection Prospects
• A lensed radio jet at milli-arcsecond resolution II: Constraints on fuzzy dark matter from an extended gravitational arc
• Molecular Gas in Lensed z>2 Quasar Host Galaxies and the Star Formation Law for Galaxies with Luminous Active Galactic Nuclei
• A complete infrared Einstein ring in the gravitational lens system B1938+666
• Redshifts of the Gravitational Lenses MG1131+0456 and B1938+666
• Soliton Oscillations and Revised Constraints from Eridanus II of Fuzzy Dark Matter
• Substructure Detection Reanalyzed: Dark Perturber shown to be a Line-of-Sight Halo
• On the density profile of dark matter substructure in gravitational lens galaxies
• SHARP - I. A high-resolution multi-band view of the infra-red Einstein ring of JVAS B1938+666
• A semi-analytic study of self-interacting dark-matter haloes with baryons
• Direct Detection of Dark Matter Substructure in Strong Lens Images with Convolutional Neural Networks
• Confronting fuzzy dark matter with the rotation curves of nearby dwarf irregular galaxies
• Strong Lensing by Galaxies
• A Parametric Model for Self-Interacting Dark Matter Halos
• SHARP -- VI. Evidence for CO (1-0) molecular gas extended on kpc-scales in AGN star forming galaxies at high redshift
• Gravitational lensing by wave dark matter halos
• Detecting low-mass haloes with strong gravitational lensing II: constraints on the density profiles of two detected subhaloes
• Discovering strongly lensed quasar candidates with catalogue-based methods from DESI Legacy Surveys
• Testing the parametric model for self-interacting dark matter using matched halos in cosmological simulations
• An Interpretation of Flat Density Cores of Clusters of Galaxies by Degeneracy Pressure of Fermionic Dark Matter: A Case Study of Abell 1689
• Exploring Self-Interacting Dark Matter Halos with Diverse Baryonic Distributions: A Parametric Approach
• Causal, Bayesian, & Non-parametric Modeling of the SARS-CoV-2 Viral Load Distribution vs. Patient's Age
• A Universal Analytic Model for Gravitational Lensing by Self-Interacting Dark Matter Halos

Cited by in corpus (2)

• Self-Interacting Dark Matter with Mass Segregation: A Unified Explanation of Dwarf Cores and Small-Scale Lenses
• Fuzzy dark matter soliton core hosting a supermassive black hole as a dense low-mass perturber in strong gravitational lensing