# Dark Matter Deficient Galaxies Produced via High-velocity Galaxy Collisions in High-resolution Numerical Simulations

@article{Shin2020DarkMD,
title={Dark Matter Deficient Galaxies Produced via High-velocity Galaxy Collisions in High-resolution Numerical Simulations},
author={Eunjee Shin and Mi Ok Jung and Go Eun Kwon and Ji-hoon Kim and Joohyun Lee and Yongseok Jo and Boon Kiat Oh},
journal={arXiv: Astrophysics of Galaxies},
year={2020}
}
• Published 20 July 2020
• Physics
• arXiv: Astrophysics of Galaxies
The recent discovery of diffuse dwarf galaxies that are deficient in dark matter appears to challenge the current paradigm of structure formation in our Universe. We describe the numerical experiments to determine if the so-called dark matter deficient galaxies (DMDGs) could be produced when two gas-rich, dwarf-sized galaxies collide with a high relative velocity of $\sim 300\,{\rm kms^{-1}}$. Using idealized high-resolution simulations with both mesh-based and particle-based gravito…
13 Citations

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## References

SHOWING 1-10 OF 85 REFERENCES
Dark-matter-deficient galaxies in hydrodynamical simulations
• Physics
Monthly Notices of the Royal Astronomical Society
• 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
Further evidence for a population of dark-matter-deficient dwarf galaxies
• Physics
Nature Astronomy
• 2019
In the standard cosmological model, dark matter drives the structure formation of galaxies and constructs potential wells within which galaxies may form. The baryon fraction in dark halos can reach
Galaxies lacking dark matter in the Illustris simulation
• Physics
Astronomy & Astrophysics
• 2019
Context. Any viable cosmological model in which galaxies interact predicts the existence of primordial and tidal dwarf galaxies (TDGs). In particular, in the standard model of cosmology (ΛCDM),
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
High-redshift Galaxy Formation with Self-consistently Modeled Stars and Massive Black Holes: Stellar Feedback and Quasar Growth
• Physics
The Astrophysical Journal
• 2019
As computational resolution of modern cosmological simulations reach ever so close to resolving individual star-forming clumps in a galaxy, a need for "resolution-appropriate" physics for a
Formation of globular cluster candidates in merging proto-galaxies at high redshift: a view from the FIRE cosmological simulations
• Physics
• 2018
Using a state-of-the-art cosmological simulation of merging proto-galaxies at high redshift from the FIRE project, with explicit treatments of star formation and stellar feedback in the interstellar
Simulating galaxy formation with black hole driven thermal and kinetic feedback
• Physics
• 2017
The inefficiency of star formation in massive elliptical galaxies is widely believed to be caused by the interactions of an active galactic nucleus (AGN) with the surrounding gas. Achieving a
Tidal dwarf galaxies in cosmological simulations
• Physics
• 2018
The formation and evolution of gravitationally bound, star forming substructures in tidal tails of interacting galaxies, called tidal dwarf galaxies (TDG), has been studied, until now, only in
Populating a cluster of galaxies - I. Results at z=0
• Physics
• 2000
ABSTRA C T We simulate the assembly of a massive rich cluster and the formation of its constituent galaxies in a flat, low-density universe. Our most accurate model follows the collapse, the star
Ultra-diffuse galaxies without dark matter
• J. Silk
• Physics
Monthly Notices of the Royal Astronomical Society: Letters
• 2019
I develop a high-velocity galaxy collision model to explain a rare but puzzling phenomenon, namely the apparent existence of ultra-diffuse galaxies with little dark matter. Predictions include