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Stellar halos around Local Group galaxies

Published online by Cambridge University Press:  09 May 2016

Alan W. McConnachie
Alan W. McConnachie*
Affiliation:
NRC Herzberg, Dominion Astrophysical Observatory, 5071 West Saanich Road, Victoria, British Columbia, Canada, V(E2E7 email: [email protected]
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Abstract

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The Local Group is now home to 102 known galaxies and candidates, with many new faint galaxies continuing to be discovered. The total stellar mass range spanned by this population covers a factor of close to a billion, from the faintest systems with stellar masses of order a few thousand to the Milky Way and Andromeda, with stellar masses of order 1011M⊙. Here, I discuss the evidence for stellar halos surrounding Local Group galaxies spanning from dwarf scales (with the case of the Andromeda II dwarf spheroidal), though to intermediate mass systems (M33) and finishing with M31. Evidence of extended stellar populations and merging is seen across the luminosity function, indicating that the processes that lead to halo formation are common at all mass scales.

Keywords

galaxies: dwarfgalaxies: evolutiongalaxies: formationgalaxies: generalgalaxies: halosLocal Groupgalaxies: stellar contentgalaxies: structure
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Issue S317: The General Assembly of Galaxy Halos: Structure, Origin and Evolution , August 2015 , pp. 15 - 20
Copyright
Copyright © International Astronomical Union 2016 

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