Counter-orbiting tidal debris as the origin of the MW DoS
Argelander Institute of Astronomy, Auf dem Hügel 71, 53121 Bonn, Germany
a e-mail: firstname.lastname@example.org
The Milky Way satellite galaxies show a phase-space distribution that is not expected from the standard scenario of galaxy formation. This is a strong hint at them being of tidal origin, which would naturally explain their spacial distribution in a disc of satellites. It is shown that also their orbital directions can be reproduced with the debris of galaxy collisions. Both co- and counter-orbiting satellites are formed naturally in merger and fly-by interactions.
© Owned by the authors, published by EDP Sciences, 2012