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 cores and cusps in spiral galaxies and their explanations

We compare proposed solutions to the core vs cusp issue of spiral galaxies, which has also been framed as a diversity problem, and demonstrate that the cuspiness of dark matter halos is correlated

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 Structure of cold dark matter halos

High resolution N-body simulations show that the density profiles of dark matter halos formed in the standard CDM cosmogony can be fit accurately by scaling a simple “universal” profile. Regardless
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