Signatures of Dark Matter Halo Expansion in Galaxy Populations

Abstract

Dark matter cores within galaxy haloes can be formed by energy feedback from star forming regions: an energy balance suggests that the maximum core formation efficiency arises in galaxies with M${}_{\star }\sim 10^{8.5}$M${}_{\odot }$. We show that a model population of galaxies, in which the density profile has been modified by such baryonic feedback, is able to explain the observed galaxy velocity function and Tully-Fisher relations significantly better than a model in which a universal cuspy density profile is assumed. Alternative models, namely warm or self-interacting dark matter, also provide a better match to these observed relations than a universal profile model does, but make different predictions for how halo density profiles vary with mass compared to the baryonic feedback case. We propose that different core formation mechanisms may be distinguished based on the imprint they leave on galaxy populations over a wide range of mass. Within the current observational data we find evidence of the expected signatures of the mass dependence of core formation generated by baryonic feedback.

11 pages, 9 figures, accepted in MNRAS

References in corpus (23)

• High-Resolution Rotation Curves and Galaxy Mass Models from THINGS
• Ubiquitous outflows in DEEP2 spectra of star-forming galaxies at z=1.4
• Updated Nearby Galaxy Catalog
• A common mass scale for satellite galaxies of the Milky Way
• High-resolution mass models of dwarf galaxies from LITTLE THINGS
• The kinematic status and mass content of the Sculptor dwarf spheroidal galaxy
• A mass-dependent density profile for dark matter haloes including the influence of galaxy formation
• High-resolution dark matter density profiles of THINGS dwarf galaxies: Correcting for non-circular motions
• Too Big to Fail in the Local Group
• Dwarf galaxies in CDM and SIDM with baryons: observational probes of the nature of dark matter
• Is there a "too big to fail" problem in the field?
• On the galaxy stellar mass function, the mass-metallicity relation, and the implied baryonic mass function
• The rotation curves shapes of late-type dwarf galaxies
• Bent by baryons: the low mass galaxy-halo relation
• The Tully-Fisher Relation and Its Residuals for a Broadly Selected Sample of Galaxies
• The velocity function in the local environment from LCDM and LWDM constrained simulations
• Dwarf Galaxy Dark Matter Density Profiles Inferred from Stellar and Gas Kinematics
• M31 Satellite Masses Compared to LCDM Subhaloes
• Cores and Cusps in the Dwarf Spheroidals
• Expanded haloes, abundance matching and too-big-to-fail in the Local Group
• Scalelength of disc galaxies
• The Main Sequence and the Fundamental Metallicity Relation in MaGICC Galaxies: Evolution and Scatter
• HI Science with the Square Kilometre Array

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• NIHAO XIV: Reproducing the observed diversity of dwarf galaxy rotation curve shapes in LCDM
• NIHAO X: Reconciling the local galaxy velocity function with Cold Dark Matter via mock HI observations
• An assessment of the "too big to fail" problem for field dwarf galaxies in view of baryonic feedback effects
• How to Reconcile the Observed Velocity Function of Galaxies with Theory
• Hints against the cold and collisionless nature of dark matter from the galaxy velocity function
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• A new astrophysical solution to the Too Big To Fail problem - Insights from the MoRIA simulations
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• A matter of measurement: rotation velocities and the velocity function of dwarf galaxies
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• Dark Matter Response to Galaxy Assembly History
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• The MUSE-Faint survey. IV. Dissecting Leo T, a gas-rich relic with recent star formation
• Constraining cosmology with the velocity function of low-mass galaxies
• Using Artificial Intelligence and real galaxy images to constrain parameters in galaxy formation simulations
• The north-south asymmetry of the ALFALFA HI velocity width function
• Quantitatively rating galaxy simulations against real observations with anomaly detection
• The Impact of Star Formation Histories on the Inner Dark Matter Density Slopes of Galaxies