Tidal Dwarf Galaxies Bonn 2009: Ghosts from structure formation

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

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Poster

Title: Dynamical friction and shell galaxies

Poster file: poster_Ebrova.pdf

Abstract:

Shell galaxies are galaxies containing fine stellar structures in their luminous profile. These structures form open, concentric arcs - the shells. It is widely believed that the shells are a signature of a merger experienced by the host galaxy. The model of a radial merger is quite successful in reproducing the regular kind of shell systems. We are trying to improve our semi-analytical simulations of the shell origin by including the dynamical friction and the gradual disruption. We used radial symmetry of our galaxies to include the dynamical friction by the means of an improved version of the Chandrasekhar formula. It seems that the dynamical friction and gradual disruption have significant influence on the shell structure.

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