Baryonic clues to the puzzling diversity of dwarf galaxy rotation curves

@article{SantosSantos2020BaryonicCT,
  title={Baryonic clues to the puzzling diversity of dwarf galaxy rotation curves},
  author={Isabel M.E. Santos-Santos and Julio F. Navarro and Andrew Robertson and Alejandro Ben'itez-Llambay and Kyle A. Oman and Mark R. Lovell and Carlos S. Frenk and Aaron D Ludlow and Azadeh Fattahi and Adam Ritz},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2020}
}
We use a compilation of disc galaxy rotation curves to assess the role of the luminous component (‘baryons’) in the rotation curve diversity problem. As in earlier work, we find that rotation curve shape correlates with baryonic surface density: high surface density galaxies have rapidly rising rotation curves consistent with cuspy cold dark matter haloes; slowly rising rotation curves (characteristic of galaxies with inner mass deficits or ‘cores’) occur only in low surface density galaxies… 
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References

SHOWING 1-10 OF 85 REFERENCES
The low-mass end of the baryonic Tully-Fisher relation
The scaling of disc galaxy rotation velocity with baryonic mass (the ‘baryonic Tully–Fisher’ relation, BTF) has long confounded galaxy formation models. It is steeper than the M ∝ V3 scaling relating
The unexpected diversity of dwarf galaxy rotation curves
We examine the circular velocity profiles of galaxies in A cold dark matter (CDM) cosmological hydrodynamical simulations from the EAGLE and LOCAL GROUPS projects and compare them with a compilation
The Link between the Baryonic Mass Distribution and the Rotation Curve Shape
The observed rotation curves of disc galaxies, ranging from late-type dwarf galaxies to early-type spirals, can be fit remarkably well simply by scal ing up the contributions of the stellar and H I
Self-Interacting Dark Matter Can Explain Diverse Galactic Rotation Curves.
TLDR
The results demonstrate that the impact of the baryons on the SIDM halo profile and the scatter from the assembly history of halos as encoded in the concentration-mass relation can explain the diverse rotation curves of spiral galaxies.
MaGICC discs: matching observed galaxy relationships over a wide stellar mass range
We use the same physical model to simulate four galaxies that match the relation between stellar and total mass, over a mass range that includes the vast majority of disc galaxies. The resultant
Dark matter–baryon scaling relations from Einasto halo fits to SPARC galaxy rotation curves
Dark matter–baryon scaling relations in galaxies are important in order to constrain galaxy formation models. Here, we provide a modern quantitative assessment of these relations by modelling the
Bars in dark-matter-dominated dwarf galaxy discs.
We study the shape and kinematics of simulated dwarf galaxy discs in the APOSTLE suite of Lambda cold dark matter (Lambda CDM) cosmological hydrodynamical simulations. We find that a large fraction
Mass-Discrepancy Acceleration Relation: A Natural Outcome of Galaxy Formation in Cold Dark Matter Halos.
TLDR
Analysis of the total and baryonic acceleration profiles of a set of well-resolved galaxies identified in the eagle suite of hydrodynamic simulations finds that galaxies exhibit a characteristic acceleration g_{†}, above which baryons dominate the mass budget, as observed.
The removal of cusps from galaxy centres by stellar feedback in the early Universe
TLDR
Numerical simulations show that random bulk motions of gas in small primordial galaxies will result in a flattening of the central dark matter cusp on relatively short timescales (∼108 years), which would have operated in all star-forming galaxies at redshifts z ≥ 10.
DWARF GALAXY DARK MATTER DENSITY PROFILES INFERRED FROM STELLAR AND GAS KINEMATICS
We present new constraints on the density profiles of dark matter (DM) halos in seven nearby dwarf galaxies from measurements of their integrated stellar light and gas kinematics. The gas kinematics
...
...