Dark-matter-deficient galaxies in hydrodynamical simulations

@article{Jing2019DarkmatterdeficientGI,
  title={Dark-matter-deficient galaxies in hydrodynamical simulations},
  author={Ying-Jie Jing and Chunxiang Wang and Ran Li and Shihong Liao and Jie-Shuang Wang and Qi Guo and Liang Gao},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2019}
}
Low-mass galaxies are expected to be dark-matter-dominated even within their central regions. Recently, two observations reported two dwarf galaxies in a group environment with very little dark matter in their central regions. We explore the population and origins of dark-matter-deficient galaxies (DMDGs) using two state-of-the-art hydrodynamical simulations, the EAGLE and Illustris projects. For all satellite galaxies with 109 < M* < 1010 M$\odot$ in groups with M200 > 1013 M$\odot$, we find… 
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References

SHOWING 1-10 OF 52 REFERENCES
No cores in dark matter-dominated dwarf galaxies with bursty star formation histories
Measurements of the rotation curves of dwarf galaxies are often interpreted as requiring a constant density core at the centre, at odds with the ‘cuspy’ inner profiles predicted by N-body…
Missing dark matter in dwarf galaxies
We use cosmological hydrodynamical simulations of the APOSTLE project to examine the fraction of baryons in CDM haloes that collect into galaxies. This ‘galaxy formation efficiency’ correlates…
Dark matter deficient galaxies in the Illustris flat-$\Lambda$CDM model structure formation simulation
Surveying dark matter deficient galaxies (those with dark matter mass to stellar mass ratio $M_{\rm dm}/M_{\rm star}<1$) in the Illustris simulation of structure formation in the flat-$\Lambda$CDM…
NIHAO XV: the environmental impact of the host galaxy on galactic satellite and field dwarf galaxies
We study the impact of the host on dwarf galaxy properties using four new Milky Way-like, ultra high-resolution simulations, ($N_{\rm part} >10^7$) from the NIHAO project. We split our sample in…
A Deficit of Dark Matter from Jeans Modeling of the Ultra-diffuse Galaxy NGC 1052-DF2
The discovery of the ultra-diffuse galaxy NGC 1052-DF2 and its peculiar population of star clusters has raised new questions about the connections between galaxies and dark matter halos at the…
Tidal stripping as a possible origin of the ultra diffuse galaxy lacking dark matter
  • G. Ogiya
  • Physics
    Monthly Notices of the Royal Astronomical Society: Letters
  • 2018
Recent observations revealed a mysterious ultra diffuse galaxy, NGC1052-DF2, in the group of a large elliptical galaxy, NGC1052. Compared to expectations from abundance matching models, the dark…
Does the galaxy NGC1052–DF2 falsify Milgromian dynamics?
TLDR
The ultra-diffuse galaxy NGC1052–DF2 has a dynamical mass, determined by the motions of globular-cluster-like objects, that is essentially the same as the mass in stars, meaning that it does not have a dark matter component, and demonstrates that dark matter is not always coupled with baryonic matter on galactic scales.
The abundance of satellite galaxies in the inner region of ΛCDM Milky Way sized haloes
The concordance lambda cold dark matter (ΛCDM) cosmology predicts tens of satellite galaxies distributed in the inner region (<40 kpc) of the Milky Way (MW), yet at most 12 were discovered at present…
Baryon-induced dark matter cores in the eagle simulations
We examine the formation of dark matter (DM) cores in dwarf galaxies simulated with the eagle model of galaxy formation. As in earlier work, we find that the star formation (SF) gas density…
Tidal stripping and the structure of dwarf galaxies in the Local Group
The shallow faint-end slope of the galaxy mass function is usually reproduced in Λ cold dark matter (ΛCDM) galaxy formation models by assuming that the fraction of baryons that turn into stars drops…
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