Tidal Dwarf Galaxies Bonn 2009: Ghosts from structure formation

Physics Centre Bad Honnef (Germany), May 25-29, 2009

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Talk

Title: Dwarf galaxy evolution triggered by environmental processes

Date: Thursday 28th May

Time: 17:45 - 18:15

Presentation file: talk_Mayer.pdf

Abstract:

I will discuss how the combined effect of tidal stripping and stirring, ram pressure stripping and the cosmic ultraviolet ionizing flux at high redshift have shaped the evolution of dwarf spheroidal satellites of the Milky Way and M31. These three mechanisms folded with the accretion history of satellites into Milky-Way sized halos provided by cosmological simulations allow to explain all properties of ‘classic’ dwarf spheroidals such as Draco and Fornax (newly discovered ultra-faint dwarfs may warrant a separate discussion), from their mass-to-light ratios to their star formation histories and morphology-density relation. They also provide a clue to the missing satellites problem at the bright end which reionization alone cannot explain.

photos by Julia T. Scho (ForeignLight.com) / Marcel S. Pawlowski