Resonant stripping as the origin of dwarf spheroidal galaxies

@article{DOnghia2009ResonantSA,
  title={Resonant stripping as the origin of dwarf spheroidal galaxies},
  author={Elena D’Onghia and Gurtina Besla and Thomas J. Cox and Lars Hernquist},
  journal={Nature},
  year={2009},
  volume={460},
  pages={605-607}
}
Dwarf spheroidal galaxies are the most dark-matter-dominated systems in the nearby Universe and their origin is one of the outstanding puzzles of how galaxies form. Dwarf spheroidals are poor in gas and stars, making them unusually faint, and those known as ultra-faint dwarfs have by far the lowest measured stellar content of any galaxy. Previous theories require that dwarf spheroidals orbit near giant galaxies like the Milky Way, but some dwarfs have been observed in the outskirts of the Local… Expand
Confronting Models of Dwarf Galaxy Quenching with Observations of the Local Group
A number of mechanisms have been proposed to connect star-forming dwarf irregular galaxies with the formation of non-star-forming dwarf spheroidal galaxies, but distinguishing between theseExpand
A possible formation scenario for dwarf spheroidal galaxies – III. Adding star formation histories to the fiducial model
Dwarf spheroidal galaxies are regarded as the basic building blocks in the formation of larger galaxies and are believed to be the most dark matter dominated systems known in the Universe. There areExpand
The Stellar Structure and Kinematics of Dwarf Spheroidal Galaxies Formed by Tidal Stirring
Using high-resolution N-body simulations, we study the stellar properties of dwarf spheroidal (dSph) galaxies resulting from the tidally induced morphological transformation of disky dwarfs on aExpand
Evolutionary Tracks of Tidally Stirred Disky Dwarf Galaxies
Using collisionless N-body simulations, we investigate the tidal evolution of late-type, rotationally supported dwarfs inside Milky Way sized host galaxies. Our study focuses on a wide variety ofExpand
A possible formation scenario for dwarf spheroidal galaxies – II. A parameter study
Dwarf spheroidal (dSph) galaxies are considered the basic building blocks of the galaxy formation process in the LCDM (Lambda Cold Dark Matter) hierarchical cosmological model. These galaxies areExpand
DWARFS GOBBLING DWARFS: A STELLAR TIDAL STREAM AROUND NGC 4449 AND HIERARCHICAL GALAXY FORMATION ON SMALL SCALES
A candidate diffuse stellar substructure was previously reported in the halo of the nearby dwarf starburst galaxy NGC 4449 by Karachentsev et al. We map and analyze this feature using a uniqueExpand
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 dropsExpand
Star Formation in Isolated Dwarf Galaxies Hosting Tidal Debris: Extending the Dwarf–Dwarf Merger Sequence
Like massive galaxies, dwarf galaxies are expected to undergo major mergers with other dwarfs. However, the end state of these mergers and the role that merging plays in regulating dwarf starExpand
Tidal evolution of disky dwarf galaxies: prograde versus retrograde orbits
The formation of dwarf spheroidal galaxies in the Local Group from disky progenitors via tidal interaction with a bigger host is one of the most promising scenarios of their origin. Using N-bodyExpand
Formation of Dwarf Spheroidal Galaxies Via Mergers of Disky Dwarfs
We perform collisionless N-body simulations to investigate whether binary mergers between rotationally-supported dwarfs can lead to the formation of dwarf spheroidal galaxies (dSphs). Our simulationExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 52 REFERENCES
Early gas stripping as the origin of the darkest galaxies in the Universe
TLDR
Simulations showing that the progenitors of these galaxies were probably gas-dominated dwarf galaxies that became satellites of a larger galaxy earlier than the other dwarf spheroidals are reported, find that a combination of tidal shocks and ram pressure swept away the entire gas content about ten billion years ago. Expand
The Progenitors of Dwarf Spheroidal Galaxies
The gas-deficient dwarf spheroidal (dSph) galaxies present an evolutionary puzzle that we explore in 40 early-type and late-type dwarfs in the Local Group and nearby field. Although dSph’sExpand
Small Dwarf Galaxies Within Larger Dwarfs: Why Some Are Luminous While Most Go Dark
We consider the possibility that the Magellanic Clouds were the largest members of a group of dwarf galaxies that entered the Milky Way (MW) halo at late times. Seven of the eleven brightestExpand
The Tidal Evolution of Local Group Dwarf Spheroidals
We use N-body simulations to study the evolution of dwarf spheroidal galaxies (dSphs) driven by galactic tides. We adopt a cosmologically motivated model where dSphs are approximated by a King modelExpand
Dwarf galaxies, cold dark matter, and biased galaxy formation
A reexamination is conducted of the formation of dwarf, diffuse, metal-poor galaxies due to supernova-driven winds, in view of data on the systematic properties of dwarfs in the Local Group and VirgoExpand
Dwarf elliptical galaxies
We propose that dwarf elliptical galaxies are the bound remnants of more massive stellar systems, such as a parent galaxy which has lost more than half its mass in gas ejection during a burst of starExpand
Dark Matter Substructure within Galactic Halos
We use numerical simulations to examine the substructure within galactic and cluster mass halos that form within a hierarchical universe. Clusters are easily reproduced with a steep mass spectrum ofExpand
Starburst-driven Mass Loss from Dwarf Galaxies: Efficiency and Metal Ejection
We model the effects of repeated supernova (SN) explosions from starbursts in dwarf galaxies on the interstellar medium of these galaxies, taking into account the gravitational potential of theirExpand
A New Milky Way Dwarf Galaxy in Ursa Major
In this Letter, we report the discovery of a new dwarf satellite to the Milky Way, located at (α2000, δ2000) = (15872, 5192) in the constellation of Ursa Major. This object was detected as anExpand
A common mass scale for satellite galaxies of the Milky Way
TLDR
New measurements of the velocities of the stars in these galaxies are used to show that they are consistent with them having a common mass of about 107 within their central 300 parsecs, demonstrating that the faintest of the Milky Way satellites are the most dark-matter-dominated galaxies known. Expand
...
1
2
3
4
5
...