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Star Formation Histories of Local Group Dwarf Galaxies

Published online by Cambridge University Press:  14 August 2015

E.K. Grebel
E.K. Grebel*
Affiliation:
Astronomisches Institut Universität Würzburg Am Hubland, D-97071 Würzburg, Germany

Extract

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The Local Group contains 37 currently known or probable member galaxies within a radius of 1.8 Mpc (Grebel 1997a). 31 of these galaxies are dwarf galaxies with MB > -17 mag. The most frequent galaxy types are low-mass, gas-poor dwarf spheroidal (dSph) galaxies, which are dominated by old and intermediate-age populations, and more massive, gas-rich dwarf irregular (dIrr) galaxies with recent star formation. DSph galaxies have been found mostly in close vicinity to the large spiral galaxies in the Local Group, while dirr galaxies tend to be more distant and isolated.

References

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