# Formation of ω Centauri from an ancient nucleated dwarf galaxy in the young Galactic disc

@article{Bekki2003FormationO,
title={Formation of $\omega$ Centauri from an ancient nucleated dwarf galaxy in the young Galactic disc},
author={Kenji Bekki and Kenneth C. Freeman},
journal={Monthly Notices of the Royal Astronomical Society},
year={2003},
volume={346}
}
• Published 14 October 2003
• Physics
• Monthly Notices of the Royal Astronomical Society
We first present a self-consistent dynamical model in which ω Cen is formed from an ancient nucleated dwarf galaxy merging with the first generation of the Galactic thin disc in a retrograde manner with respect to the Galactic rotation. Our numerical simulations demonstrate that during merging between the Galaxy and the ω Cen host dwarf with M B ≃ - 14 mag and its nucleus mass of 10 7 M O ., the outer stellar envelope of the dwarf is nearly completely stripped, whereas the central nucleus can…
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## References

SHOWING 1-10 OF 32 REFERENCES
Kinematics of Tidal Debris from ω Centauri’s Progenitor Galaxy
• Physics
• 2003
We present the kinematic properties of a tidally disrupted dwarf galaxy in the Milky Way, based on the hypothesis that its central part once contained the most massive Galactic globular cluster, ω
Multiple stellar populations in the globular cluster ω Centauri as tracers of a merger event
• Physics
Nature
• 1999
The discovery of the Sagittarius dwarf galaxy, which is being tidally disrupted by and merging with the Milky Way, supports the view that the halo of the Galaxy has been built up at least partially
Evidence for the Hierarchical Formation of the Galactic Spheroid
• Physics
• 1999
The possibility that the Galactic spheroid was assembled from isolated, chemically distinct proto- Galactic fragments is investigated using a Monte Carlo technique designed to simulate the chemical
A Capture Scenario for the Globular Cluster ω Centauri
• Physics
• 2003
We explore an accretion origin for ω Cen by N-body modeling of the orbital decay and disruption of a Milky Way dwarf satellite. This work is focused on studying a particular satellite model that aims
Globular cluster formation from gravitational tidal effects of merging and interacting galaxies
• Physics
• 2002
We investigate the spatial, kinematic and chemical properties of globular cluster systems formed in merging and interacting galaxies using N-body-smoothed particle hydrodynamics (SPH) simulations.
Age and Metallicity Effects in ω Centauri: StrÖmgren Photometry at the Main-Sequence Turnoff
• Physics
• 2000
We have observed (with vby filters) a field north of the core of the most massive globular cluster in our galaxy, ω Centauri. We have found a correlation of age and metallicity in a region that
The Nuclei of Nucleated Dwarf Elliptical Galaxies — Are they Globular Clusters?
• Physics
• 1988
It came as a great surprise that many dwarf elliptical galaxies of very low surface brightness in the Virgo Cluster have conspicuous bright star-like nuclei (Reaves 1983, Binggeli, Sandage and
Discovery of an Accreted Stellar System within the Globular Cluster ω Centauri
• Physics
• 2002
Recent wide-field photometric surveys (Lee et al.; Pancino et al.) have shown the existence of a previously unknown metal-rich ([Fe/H] -0.6) stellar population in the galactic globular cluster ω
The Chemical Evolution of the Globular Cluster ω Centauri (NGC 5139)
We present abundances for 22 chemical elements in 10 red giant members of the massive Galactic globular cluster ω Centauri. The spectra are of relatively high spectral resolution and signal-to-noise.
Space Velocities of Globular Clusters. III. Cluster Orbits and Halo Substructure
• Physics
• 1999
We have compiled a catalog of absolute proper motions of globular clusters from various sources. The sample consists of 38 clusters, from which most of the southern ones (15 clusters) were measured