Gas dynamics in dwarf galaxies as testbeds for dark matter and galaxy evolution

Abstract

Dwarf galaxies are ideal laboratories to test dark matter models and alternative theories because their dynamical mass (from observed kinematics) largely outweighs their baryonic mass (from gas and stars). In most star-forming dwarfs, cold atomic gas forms regularly rotating disks extending beyond the stellar component, thus probing the gravitational potential out to the outermost regions. Here I review several aspects of gas dynamics in dwarf galaxies, such as rotation curves, mass models, and noncircular motions. Star-forming dwarfs extend the dynamical laws of spiral galaxies to lower masses, surface densities, and accelerations. The three main dynamical laws of rotation-supported galaxies point to three distinct acceleration scales, which play different physical roles but display the same value, within uncertainties. The small scatter around these dynamical laws implies a tight coupling between baryons and dark matter in galaxies, which will be better understood with next-generation surveys that will enlarge current sample sizes by orders of magnitude.

arXiv commentInvited Review for Nature Astronomy (25 pages, 5 figures, 2 boxes). Published read-only version available at https://rdcu.be/cFrZP

References in corpus (155)

• The Structure of Cold Dark Matter Halos
• Dwarf Galaxies of the Local Group
• How Do Galaxies Get Their Gas?
• The CO-to-H2 Conversion Factor
• Small-Scale Challenges to the $\Lambda$CDM Paradigm
• Star Formation Histories, Abundances and Kinematics of Dwarf Galaxies in the Local Group
• At the heart of the matter: the origin of bulgeless dwarf galaxies and Dark Matter cores
• Modified Newtonian Dynamics (MOND): Observational Phenomenology and Relativistic Extensions
• The Baryonic Tully-Fisher Relation
• The Core-Cusp Problem
• Modified Newtonian Dynamics as an Alternative to Dark Matter
• SPARC: Mass Models for 175 Disk Galaxies with Spitzer Photometry and Accurate Rotation Curves
• The Radial Acceleration Relation in Rotationally Supported Galaxies
• Updated Nearby Galaxy Catalog
• The unexpected diversity of dwarf galaxy rotation curves
• The Baryonic Tully-Fisher Relation of Gas Rich Galaxies as a Test of LCDM and MOND
• The Ursa Major Cluster of Galaxies. V ; HI Rotation Curve Shapes and the Tully-Fisher Relations
• The dark and baryonic matter content of low surface brightness disk galaxies
• A Stellar Mass Threshold for Quenching of Field Galaxies
• The GALEX Arecibo SDSS Survey. I. Gas Fraction Scaling Relations of Massive Galaxies and First Data Release
• High-resolution mass models of dwarf galaxies from LITTLE THINGS
• The Circular Velocity Curve of the Milky Way from $5$ to $25$ kpc
• Thick gas discs in faint dwarf galaxies
• Little Things
• One Law To Rule Them All: The Radial Acceleration Relation of Galaxies
• The Systematic Properties of the Warm Phase of Starburst-Driven Galactic Winds
• High-Resolution Measurements of the Halos of Four Dark Matter-Dominated Galaxies: Deviations from a Universal Density Profile
• The Impact of Star Formation on the Interstellar Medium in Dwarf Galaxies: II. The Formation of Galactic Winds
• Dwarf Elliptical Galaxies
• Dark matter cores all the way down
• The Westerbork HI Survey of Spiral and Irregular Galaxies I. HI Imaging of Late-type Dwarf Galaxies
• A mass-dependent density profile for dark matter haloes including the influence of galaxy formation
• The small scatter of the baryonic Tully-Fisher relation
• A New Look at the Large-Scale HI Structure of the LMC
• Measuring non-axisymmetry in spiral galaxies
• The Mass Discrepancy-Acceleration Relation: Disk Mass and the Dark Matter Distribution
• A new relativistic theory for Modified Newtonian Dynamics
• FIGGS: Faint Irregular Galaxies GMRT Survey - Overview, observations and first results
• WALLABY -- An SKA Pathfinder HI Survey
• The dark matter crisis: falsification of the current standard model of cosmology
• NGC 3741: dark halo profile from the most extended rotation curve
• Is there a "too big to fail" problem in the field?
• HI kinematics and dynamics of Messier 31
• 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
• The Nature of Starbursts: I. The Star Formation Histories of Eighteen Nearby Starburst Dwarf Galaxies
• Neutral Gas Distributions and Kinematics of Five Blue Compact Dwarf Galaxies
• Dwarf Galaxy Starburst Statistics in the Local Volume
• A wide-field HI mosaic of Messier 31. II.The disk warp, rotation and the dark matter halo
• Modeling Non-Circular Motions in Disk Galaxies: Application to NGC 2976
• The Westerbork HI Survey of spiral and irregular galaxies III: HI observations of early-type disk galaxies
• The Mass and Momentum Outflow Rates of Photoionized Galactic Outflows
• The Nature of Starbursts : II. The Duration of Starbursts in Dwarf Galaxies
• The Shape of the Gravitational Potential in Cold Dark Matter Halos
• Fitting the radial acceleration relation to individual SPARC galaxies
• Predictions for ASKAP Neutral Hydrogen Surveys
• Dynamical Centers and Non-Circular Motions in THINGS Galaxies: Implications for Dark Matter Halos
• CO Emission in Low Luminosity, HI Rich Galaxies
• From Tidal Dwarf Galaxies to Satellite Galaxies
• Kinematic modelling of disk galaxies I. A new method to fit tilted rings to data cubes
• Off the baryonic Tully-Fisher relation: a population of baryon-dominated ultra-diffuse galaxies
• The dwarf galaxy DDO 47 as a dark matter laboratory: testing cusps hiding in triaxial halos
• The universal rotation curve of dwarf disk galaxies
• Non-circular motions and the diversity of dwarf galaxy rotation curves
• The Planes of Satellite Galaxies Problem, Suggested Solutions, and Open Questions
• Testing Feedback-Modified Dark Matter Haloes with Galaxy Rotation Curves: Estimation of Halo Parameters and Consistency with $\Lambda$CDM
• A comprehensive catalog of dark matter halo models for SPARC galaxies
• Testing the Strong Equivalence Principle: Detection of the External Field Effect in Rotationally Supported Galaxies
• VLA-ANGST: A high-resolution HI Survey of Nearby Dwarf Galaxies
• LITTLE THINGS in 3D: robust determination of the circular velocity of dwarf irregular galaxies
• The Mass-Discrepancy Acceleration Relation: a Natural Outcome of Galaxy Formation in Cold Dark Matter halos
• The Relation between Stellar and Dynamical Surface Densities in the Central Regions of Disk Galaxies
• A Keck/HIRES Study of Kinematics of the Cold Interstellar Medium in Dwarf Starburst Galaxies
• The Local Volume HI Survey (LVHIS)
• Robust HI kinematics of gas-rich ultra-diffuse galaxies: hints of a weak-feedback formation scenario
• The triggering of starbursts in low-mass galaxies
• Galactic Winds in Low-Mass Galaxies
• Gas dynamics in tidal dwarf galaxies: disc formation at z=0
• A Study in Blue: The Baryon Content of Isolated Low Mass Galaxies
• Kinematic Constraints on Evolutionary Scenarios for Blue Compact Dwarf Galaxies : I. Neutral Gas Dynamics
• The mass discrepancy acceleration relation in a $\Lambda$CDM context
• A Chandra X-ray survey of nearby dwarf starburst galaxies: II. Starburst properties and outflows
• Automated Kinematic Modelling of Warped Galaxy Discs in Large Hi Surveys: 3D Tilted Ring Fitting of HI Emission Cubes
• A statistical investigation of the mass discrepancy-acceleration relation
• Dynamics of Starbursting Dwarf Galaxies: I Zw 18
• The origin of the mass discrepancy-acceleration relation in $\Lambda$CDM
• Dense cloud cores revealed by CO in the low metallicity dwarf galaxy WLM
• Cosmology and Convention
• Star Formation in Sculptor Group Dwarf Irregular Galaxies and the Nature of "Transition" Galaxies
• Λ CDM is Consistent with SPARC Radial Acceleration Relation
• Local Volume TiNy Titans: Gaseous Dwarf-Dwarf Interactions in the Local Universe
• The intriguing HI gas in NGC 5253: an infall of a diffuse, low-metallicity HI cloud?
• The angular momentum-mass relation: a fundamental law from dwarf irregulars to massive spirals
• Galactic rotation curves, the baryon-to-dark-halo-mass relation and space-time scale invariance
• On the apparent coupling of neutral hydrogen and dark matter in spiral galaxies
• Dynamical signatures of a LCDM-halo and the distribution of the baryons in M33
• The Star Forming Main Sequence of Dwarf Low Surface Brightness Galaxies
• An assessment of the "too big to fail" problem for field dwarf galaxies in view of baryonic feedback effects
• Universal MOND relation between the baryonic and `dynamical' central surface densities of disc galaxies
• ALFALFA Discovery of the Nearby Gas-rich Dwarf Galaxy Leo P. V. Neutral Gas Dynamics and Kinematics
• Internal dynamics and stellar content of nine ultra-diffuse galaxies in the Coma cluster prove their evolutionary link with dwarf early-type galaxies
• The scatter, residual correlations and curvature of the SPARC baryonic Tully-Fisher relation
• HALOGAS: the properties of extraplanar HI in disc galaxies
• A general class of gravitational theories as alternatives to dark matter where the speed of gravity always equals the speed of light
• Dynamics of Starbursting Dwarf Galaxies. II. UGC 4483
• The baryonic specific angular momentum of disc galaxies
• HI Imaging Observations of Superthin Galaxies. I. UGC7321
• On the dynamics of the Small Magellanic Cloud through high-resolution ASKAP HI observations
• NIHAO XII: galactic uniformity in a ΛCDM universe
• A scaling-relation for disc galaxies: circular-velocity gradient versus central surface brightness
• First Gaia Local Group Dynamics: Magellanic Clouds Proper Motion and Rotation
• The MUSE view of He 2-10: no AGN ionization but a sparkling starburst
• 2D Bayesian automated tilted-ring fitting of disk galaxies in large HI galaxy surveys: 2DBAT
• HI Imaging Observations of Superthin Galaxies. II. IC2233 and the Blue Compact Dwarf NGC2537
• A blind HI survey in the Canes Venatici region
• Evolution of dwarf galaxies: a dynamical perspective
• A kinematic study of the irregular dwarf galaxy NGC 4861 using HI and Halpha observations
• Deep neutral hydrogen observations of Leo T with the Westerbork Synthesis Radio Telescope
• Scaling relations and baryonic cycling in local star-forming galaxies: II. Gas content and star-formation efficiency
• The Complex Neutral Gas Dynamics Of The Dwarf Starburst Galaxy NGC 625
• The Link between the Baryonic Mass Distribution and the Rotation Curve Shape
• The Nature of Starbursts: III. The Spatial Distribution of Star Formation
• A kinematic study of the irregular dwarf galaxy NGC 2366 using HI and Halpha observations
• Inflows and Outflows in the Dwarf Starburst Galaxy NGC 5253: High-Resolution HI Observations
• Systematically Measuring Ultra Diffuse Galaxies in HI: Results from the Pilot Survey
• The volumetric star formation law for nearby galaxies -- Extension to dwarf galaxies and low-density regions
• The Radial Acceleration Relation in Disk Galaxies in the MassiveBlack-II Simulation
• A new astrophysical solution to the Too Big To Fail problem - Insights from the MoRIA simulations
• SHIELD: Neutral Gas Kinematics and Dynamics
• Chemical and stellar properties of star-forming dwarf galaxies
• Galactic Outflows, Star Formation Histories, and Timescales in Starburst Dwarf Galaxies from STARBIRDS
• Mass models from high-resolution HI data of the dwarf galaxy NGC 1560
• Halpha Kinematics of S4G Spiral Galaxies - III. Inner rotation curves
• Bars in dark matter-dominated dwarf galaxy discs
• The Imprint of Spiral Arms on the Galactic Rotation Curve
• Galactic fountains and outflows in star forming dwarf galaxies: ISM expulsion and chemical enrichment
• The Link Between Light and Mass in Late-type Spiral Galaxy Disks
• ALMA Observations toward the starburst dwarf galaxy NGC 5253: I. Molecular cloud properties and scaling relations
• The HI Chronicles of LITTLE THINGS BCDS III: Gas Clouds in and around Mrk 178, VII Zw 403, AND NGC 3738
• On the radial acceleration relation of $\Lambda$CDM satellite galaxies
• SH$\alpha$DE: Survey description and mass-kinematics scaling relations for dwarf galaxies
• Outflow or galactic wind: The fate of ionized gas in the halos of dwarf galaxies
• Warp or lag? The ionized and neutral hydrogen gas in the edge-on dwarf galaxy UGC 1281
• Atomic hydrogen, star formation and feedback in the lowest mass Blue Compact Dwarf galaxies
• ALMA Resolves Giant Molecular Clouds in a Tidal Dwarf Galaxy
• A shallow dark matter halo in Ultra Diffuse Galaxy AGC 242019: are UDGs structurally similar to low surface brightness galaxies?
• Mass models of gas-rich void dwarf galaxies
• Stellar Feedback and the Energy Budget of Late-Type Galaxies: Missing Baryons and Core Creation
• The Dark Matter Distributions in Low-Mass Disk Galaxies. I. H$\alpha$ Observations Using the Palomar Cosmic Web Imager
• Three-dimensional modeling of the HI kinematics of NGC 2915
• Testing core creation in hydrodynamical simulations using the HI kinematics of field dwarfs
• The impact of the halo spin-concentration relation on disc scaling laws
• The Shape of Dark Matter Haloes II. The Galactus HI Modelling & Fitting Tool
• Gas engaged in noncircular motions in LITTLE THINGS dwarf irregular galaxies

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• Cold gas disks in main-sequence galaxies at cosmic noon: Low turbulence, flat rotation curves, and disk-halo degeneracy
• The ALMA-ALPAKA survey II. Evolution of turbulence in galaxy disks across cosmic time: difference between cold and warm gas
• The many reasons that the rotation curves of low-mass galaxies can fail as tracers of their matter distributions
• Exploring the nature of dark matter with the extreme galaxy AGC 114905
• The effect of the environment-dependent stellar initial mass function on the photometric properties of star-forming galaxies
• It's a Breeze: The Circumgalactic Medium of a Dwarf Galaxy is Easy to Strip
• The Merian Survey: Design, Construction, and Characterization of a Filter Set Optimized to Find Dwarf Galaxies and Measure their Dark Matter Halo Properties with Weak Lensing
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• Galactic Mass-to-Light Ratios With Superfluid Dark Matter
• Disk galaxies are self-similar: the universality of the HI-to-Halo mass ratio for isolated disks
• A Comparative Study of Star Forming Dwarf Galaxies using the UVIT
• Dwarf galaxies with central cores in modified Newtonian dynamics (MOND) gravity
• A New Uncertainty Scheme for Galaxy Distances from Flow Models
• Nuclear star clusters as probes of dark matter halos: the case of the Sagittarius Dwarf Spheroidal Galaxy
• Unveiling the nature and fate of the almost-dark cloud AGC 226178 through HI mapping
• Consistent cosmological structure formation on all scales in relativistic extensions of MOND
• The MeerKAT Fornax Survey V. H i kinematics and Fornax cluster membership of the dwarf galaxy ESO 358-60
• Understanding Galaxy Rotation Curves with Verlinde's Emergent Gravity
• The baryonic mass-size relation of galaxies. II. Implications for the evolutionary paths between star-forming and passive galaxies
• The tidal features of the classical Milky Way satellites: Expected in MOND but inconsistent with cold dark matter models