The Progenitors of Dwarf Spheroidal Galaxies

@article{Grebel2002ThePO,
  title={The Progenitors of Dwarf Spheroidal Galaxies},
  author={Eva K. Grebel and John S. Gallagher III 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… 

Figures and Tables from this paper

Spatially Resolved Stellar Populations in Dwarf and Giant Galaxies
The dwarf elliptical galaxies (dEs) are more luminous than dwarf spheroidals and fainter than “normal” ellipticals. In this paper I investigate the interconnection between these three families of
Star formation history and evolution of gas-rich dwarf galaxies in the Centaurus A group
We analyse the properties of three unusual dwarf galaxies in the Centaurus A group discovered with the HIPASS survey. From their optical morphology, they appear to be low surface brightness dwarf
Globular clusters in early-type dwarf galaxies
One of the main aims of modern astrophysics is to understand the role of dwarf galaxies and their globular cluster (GC) systems as building blocks of massive galaxies. Dwarf spheroidal (dSph) and
Dwarf Elliptical Galaxies: United and Divided
Although of humble appearance and often overlooked because of their modest physical sizes and low star densities, dwarf elliptical (dE) galaxies revealed themselves as the most common type of
Dwarf spheroidal satellite formation in a reionized Local Group
Dwarf spheroidal satellite galaxies have emerged a powerful probe of small-scale dark matter clustering and of cosmic reionization. They exhibit structural and chemical continuity with dwarf
The dynamical and chemical evolution of dwarf spheroidal galaxies
We present a large sample of fully self-consistent hydrodynamical Nbody/Tree-SPH simulations of isolated dwarf spheroidal galaxies (dSphs). It has enabled us to identify the key physical parameters
Population gradients and photometric metallicities in early- and transition-type dwarf galaxies: Clues from the Sculptor group ,,
Aims. We focus on the resolved stellar populations of one early-type and four transition-type dwarf galaxies in the Sculptor group, with the aim to examine the potential presence of population
The Origin of Dwarf Ellipticals in the Virgo Cluster
We study the evolution of dwarf (LH < 109.6 LH☉) star-forming and quiescent galaxies in the Virgo Cluster by comparing their UV to radio centimetric properties to the predictions of multizone
Resonant stripping as the origin of dwarf spheroidal galaxies
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
The evolution of the photometric properties of Local Group dwarf spheroidal galaxies
Aims. We investigate the present-day photometric properties of the dwarf spheroidal galaxies in the Local Group. From the analysis of their integrated colours, we consider a possible link between
...
...

References

SHOWING 1-10 OF 163 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 fade
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 dwarf
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 matter
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, larger
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 histories
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 chemical
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 the
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-based
Tidal Stirring and the Origin of Dwarf Spheroidals in the Local Group
N-body + smoothed particle hydrodynamics (SPH) simulations are used to study the evolution of dwarf irregular galaxies (dIrr's) entering the dark matter halo of the Milky Way or M31 on plunging
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-Resolution
...
...