Shell Galaxies: Dynamical Friction, Gradual Satellite Decay and Merger Dating

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Authors	EBROVA Ivana JUNGWIERT Bruno CANALIZO Gabriela BENNERT Nicola JÍLKOVÁ Lucie
Year of publication	2010
Type	Article in Proceedings
Conference	GALAXY WARS: STELLAR POPULATIONS AND STAR FORMATION IN INTERACTING GALAXIES
MU Faculty or unit	Faculty of Science
Citation
Web	http://aspbooks.org/custom/publications/paper/423-0236.html
Keywords	shell galaxies
Description	With the goal to refine modelling of shell galaxies and the use of shells to probe the merger history, we develop a new method for implementing dynamical friction in test-particle simulations of radial minor mergers. The friction is combined with a gradual decay of the dwarf galaxy. The coupling of both effects can considerably redistribute positions and luminosities of shells; neglecting them can lead to significant errors in attempts to date the merger.
Related projects:	Physics of Sun, stars, and stellar systems