Pavel Kroupa on “The vast polar structures around the Milky Way and Andromeda “
In case you, like me, have missed Pavel Kroups's recent talk at the Joint Astronomical Colloquium in Heidelberg, you now have the opportunity to watch a movie of the event and download the slides. The movie is quite long (more than an hour), but it is worth watching it to the end. While the talk is titled "The vast polar structures around the Milky Way and Andromeda", Pavel talks about much more, starting with tidal dwarf galaxies and ending with a discussion of indications for an alternative model of gravity.
This presentation is very similar and in most parts identical to Pavel's presentations held at Monterey at the conference "Probes of Dark Matter on Galaxy Scales" and in Durham at the "Ripples in the Cosmos" conference. The latter talk resulted in quite a discussion on Peter Coles' (aka Telescoper) blog "In the Dark", following his criticism of Pavel's talk as being "poorly argued and full of grossly exaggerated claims". The video of a very similar presentation now offers everybody the opportunity to develop their own opinion on the issue. Given the numerous questions Pavel got during his talk and afterwards, people must have thought that it was worth the effort to argue with him, in contrast to Peter's opinion.
See the overview of topics in The Dark Matter Crisis.