The Progenitors of Dwarf Spheroidal Galaxies

@article{Grebel2002ThePO,
  title={The Progenitors of Dwarf Spheroidal Galaxies},
  author={Eva K. Grebel and John S. Iii Gallagher and Daniel R. Harbeck},
  journal={The Astronomical Journal},
  year={2002},
  volume={125},
  pages={1926-1939}
}
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’s experienced star formation over extended time spans in their youths, today all but one are completely free of detectable interstellar material, even in the Fornax dSph, where stars formed in the last 100 Myr. Combining photometric and spectroscopic stellar metallicity estimates for red giant branches with… Expand

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References

SHOWING 1-10 OF 164 REFERENCES
The evolution of dwarf galaxies.
We propose an evolutionary model for dwarf galaxies in Which initially metal-poor gas-rich dwarf irregular (dI) galaxies evolve through bursting Blue Compact Dwarf(BCD) stages and eventually fadeExpand
VLT/UVES Abundances in Four Nearby Dwarf Spheroidal Galaxies. II. Implications for Understanding Galaxy Evolution*
We have used the Ultraviolet Visual-Echelle Spectrograph (UVES) on Kueyen (UT2) of the Very Large Telescope to take spectra of 15 individual red giant stars in the centers of four nearby dwarfExpand
GAS-RICH DWARF SPHEROIDALS
We present evidence that 10 of the 21 dwarf spheroidal galaxies (dSph and dSph/dIrr) in the Local Group are associated with large reservoirs of atomic gas, reservoirs that are, in some cases, largerExpand
The Metamorphosis of Tidally Stirred Dwarf Galaxies
We present results from high-resolution N-body/SPH (smoothed particle hydrodynamic) simulations of rotationally supported dwarf irregular galaxies moving on bound orbits in the massive dark matterExpand
Chemical evolution models of local dwarf spheroidal galaxies
We calculate chemical evolution models for four dwarf spheroidal (dSph) satellites of the Milky Way (Carina, Ursa Minor, Leo I and Leo II) for which reliable non-parametric star formation historiesExpand
Exploring Halo Substructure with Giant Stars. II. Mapping the Extended Structure of the Carina Dwarf Spheroidal Galaxy
As part of our survey for substructure in the Milky Way halo as traced by giant stars and to look for tidal stellar debris in the halo viable for measurement of the Galactic mass potential with theExpand
Properties of Two New M31 Dwarf Spheroidal Companions from Keck Imaging
We have obtained images in V and I of the newly discovered Local Group dwarf galaxies Pegasus dSph and Cassiopeia dSph and their surrounding field using the Keck 10 m telescope and Low-ResolutionExpand
Dwarf elliptical galaxies: structure, star formation and colour-magnitude diagrams
The aim of this paper is to cast light on the formation and evolution of elliptical galaxies by means of N-body/hydro-dynamical simulations that include star formation, feed-back and chemicalExpand
The Star Formation History of LGS 3
We have determined the distance and star formation history of the Local Group dwarf galaxy LGS 3 from deep Hubble Space Telescope WFPC2 observations. LGS 3 is intriguing because ground-basedExpand
The Oldest Stars of the Extremely Metal-Poor Local Group Dwarf Irregular Galaxy Leo A*
We present deep Hubble Space Telescope (HST) single-star photometry of Leo A in B, V, and I. Our new field of view is offset from the centrally located field observed by Tolstoy et al. in order toExpand
...
1
2
3
4
5
...