Baryon-Interacting Dark Matter: heating dark matter and the emergence of galaxy scaling relations

Abstract

The empirical scaling relations observed in disk galaxies remain challenging for models of galaxy formation. The most striking among these is the Mass Discrepancy-Acceleration Relation (MDAR), which encodes both a tight baryonic Tully-Fisher relation (BTFR) and the observed diversity of galaxy rotation curves through the central surface density relation (CSDR). Building on our earlier work, we propose here that the MDAR is the result of interactions between baryons and 'Baryon-Interacting Dark Matter' (BIDM), which heat up the dark matter. Following a bottom-up, hydrodynamical approach, we find that the MDAR follows if: $i)$ the BIDM equation of state approximates that of an ideal gas; $ii)$ the BIDM relaxation time is order the Jeans time; $iii)$ the heating rate is inversely proportional to the BIDM density. Remarkably, under these assumptions the set of hydrodynamical equations together with Poisson's equation enjoy an anisotropic scaling symmetry. In the BIDM-dominated regime, this gives rise to an enhanced symmetry which fully captures the low-acceleration limit of the MDAR. We then show that, assuming a cored pseudo-isothermal profile at equilibrium, this set of equations gives rise to parameters reproducing the MDAR. Specifically, in the flat part of the rotation curve the asymptotic rotational velocity matches the parametric dependence of the BTFR. Moreover, in the central region of high-surface brightness galaxies, the profile reproduces the CSDR. Finally, by studying the time-dependent approach to equilibrium, we derive a global combination of the BTFR and CSDR, which matches the expectations in low surface-brightness galaxies. The form of the heating rate also makes model-independent predictions for various cosmological observables. We argue that our scenario satisfies existing observational constraints, and, intriguingly, offers a possible explanation to the EDGES anomaly.

arXiv comment32 pages. v2: Minor edits, references added

References in corpus (98)

• A Universal Density Profile from Hierarchical Clustering
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• Observational evidence for self-interacting cold dark matter
• Small-Scale Challenges to the $\Lambda$CDM Paradigm
• Relativistic gravitation theory for the MOND paradigm
• An absorption profile centred at 78 megahertz in the sky-averaged spectrum
• Halo Formation in Warm Dark Matter Models
• Direct constraints on the dark matter self-interaction cross-section from the merging galaxy cluster 1E0657-56
• Modified Newtonian Dynamics (MOND): Observational Phenomenology and Relativistic Extensions
• The Baryonic Tully-Fisher Relation
• The Core-Cusp Problem
• Constraints on the Self-Interaction Cross-Section of Dark Matter from Numerical Simulations of the Merging Galaxy Cluster 1E 0657-5
• Modified Newtonian Dynamics as an Alternative to Dark Matter
• The Hubble Hunter's Guide
• The Radial Acceleration Relation in Rotationally Supported Galaxies
• Milky Way Cepheid Standards for Measuring Cosmic Distances and Application to Gaia DR2: Implications for the Hubble Constant
• Emergent Gravity and the Dark Universe
• Possible interaction between baryons and dark-matter particles revealed by the first stars
• The non-gravitational interactions of dark matter in colliding galaxy clusters
• The unexpected diversity of dwarf galaxy rotation curves
• A constant dark matter halo surface density in galaxies
• H0LiCOW - IX. Cosmographic analysis of the doubly imaged quasar SDSS 1206+4332 and a new measurement of the Hubble constant
• One Law To Rule Them All: The Radial Acceleration Relation of Galaxies
• Modified Newtonian Dynamics in the Milky Way
• The small scatter of the baryonic Tully-Fisher relation
• Insights on Dark Matter from Hydrogen during Cosmic Dawn
• How the Self-Interacting Dark Matter Model Explains the Diverse Galactic Rotation Curves
• Theory of Dark Matter Superfluidity
• Severely Constraining Dark Matter Interpretations of the 21-cm Anomaly
• The Mass Discrepancy-Acceleration Relation: Disk Mass and the Dark Matter Distribution
• Signs of Dark Matter at 21-cm?
• The rotation curves shapes of late-type dwarf galaxies
• Understanding the shape and diversity of dwarf galaxy rotation curves in LCDM
• The baryonic Tully-Fisher relation for different velocity definitions and implications for galaxy angular momentum
• On the Proof of Dark Matter, the Law of Gravity and the Mass of Neutrinos
• Tighter Limits on Dark Matter Explanations of the Anomalous EDGES 21cm Signal
• Fitting the radial acceleration relation to individual SPARC galaxies
• Spreading out and staying sharp - Creating diverse rotation curves via baryonic and self-interaction effects
• Off the baryonic Tully-Fisher relation: a population of baryon-dominated ultra-diffuse galaxies
• Heating of Baryons due to Scattering with Dark Matter During the Dark Ages
• Reviving Millicharged Dark Matter for 21-cm Cosmology
• Constraints on MOND theory from radio tracking data of the Cassini spacecraft
• Constraints on dark matter interactions with standard model particles from CMB spectral distortions
• THINGS about MOND
• Dark halo properties from rotation curves
• The Mass-Discrepancy Acceleration Relation: a Natural Outcome of Galaxy Formation in Cold Dark Matter halos
• Reconciling the Diversity and Uniformity of Galactic Rotation Curves with Self-Interacting Dark Matter
• The Effects of Dark Matter-Baryon Scattering on Redshifted 21 cm Signals
• Improving relativistic MOND with Galileon k-mouflage
• The Relation between Stellar and Dynamical Surface Densities in the Central Regions of Disk Galaxies
• The MOND limit from space-time scale invariance
• Fundamental Particle Structure in the Cosmological Dark Matter
• Dark Matter Superfluidity and Galactic Dynamics
• Gravitational polarization and the phenomenology of MOND
• The globular cluster NGC 2419: a crucible for theories of gravity
• The mass discrepancy acceleration relation in a $\Lambda$CDM context
• Model of Dark Matter and Dark Energy Based on Gravitational Polarization
• Cores of Dark Matter Halos Correlate with Disk Scale Lengths
• An Alternative to Particle Dark Matter
• Combined Solar System and rotation curve constraints on MOND
• The origin of the mass discrepancy-acceleration relation in $\Lambda$CDM
• NIHAO XIV: Reproducing the observed diversity of dwarf galaxy rotation curve shapes in LCDM
• Λ CDM is Consistent with SPARC Radial Acceleration Relation
• Cold Dark Matter with MOND Scaling
• Dark matter-radiation interactions: the impact on dark matter haloes
• Absence of a fundamental acceleration scale in galaxies
• The Mismeasure of Mergers: Revised Limits on Self-interacting Dark Matter in Merging Galaxy Clusters
• Physics of Dark Matter in the Light of Dark Atoms
• The scatter, residual correlations and curvature of the SPARC baryonic Tully-Fisher relation
• Phenomenological consequences of superfluid dark matter with baryon-phonon coupling
• A general class of gravitational theories as alternatives to dark matter where the speed of gravity always equals the speed of light
• Dark Matter via Massive (bi-)Gravity
• Direct millicharged dark matter cannot explain EDGES
• Composite Dark Matter and Puzzles of Dark Matter Searches
• Another Path for the Emergence of Modified Galactic Dynamics from Dark Matter Superfluidity
• An accurate measurement of the baryonic Tully-Fisher relation with heavily gas-dominated ALFALFA galaxies
• Chiral Gravitational Waves and Baryon Superfluid Dark Matter
• Galaxy disc scaling relations: A tight linear galaxy -- halo connection challenges abundance matching
• Galaxy Clusters in the Context of Superfluid Dark Matter
• Unified Superfluid Dark Sector
• Dynamical Friction in Superfluids
• NIHAO XVIII: Origin of the MOND phenomenology of galactic rotation curves in a LCDM universe
• Emergence of the mass discrepancy-acceleration relation from dark matter-baryon interactions
• Dipolar Dark Matter with Massive Bigravity
• Dark Matter, Infinite Statistics and Quantum Gravity
• A common Milgromian acceleration scale in nature
• Neutral versus ionized gas kinematics at z~2.6: The AGN-host starburst galaxy PKS 0529-549
• Dark matter-baryon scaling relations from Einasto halo fits to SPARC galaxy rotation curves
• The Equation of State of Dark Matter Superfluids
• Gravitational wave as probe of superfluid dark matter
• Dark Matter Superfluidity
• Emergent gravity in galaxies and in the Solar System
• Emergent long-range interactions in Bose-Einstein Condensates
• Strong lensing with superfluid dark matter
• Modified Dark Matter: Relating Dark Energy, Dark Matter and Baryonic Matter
• UV self-completion of a theory of Superfluid Dark Matter
• Phenomenology of a Neutrino-DM Coupling: The Scalar Case
• The universal acceleration scale from stellar feedback

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• $\mathcal{H}$olographic $\mathcal{N}$aturalness and Information See-Saw Mechanism for Neutrinos
• Pattern dark matter and galaxy scaling relations
• Disk galaxies and their dark halos as self-organized patterns
• Distinct radial acceleration relations of galaxies and galaxy clusters supports hyperconical modified gravity
• Evolution of Cosmological Total Energy Density and Transient Periods in Cosmology