Today, the preprint of a new paper I co-authored appeared on the arXiv. I has the rather long title “The vast thin plane of M31 co-rotating dwarfs: an additional fossil signature of the M31 merger and of its considerable impact in the whole Local Group“, which summarizes its content pretty well. The lead-authors are François Hammer, Yanbin Yang and Sylvain Fouquet, whom I have recently visited in Paris. Have a look!

After a temporarily successful attempt by a blogger demanding the discontinuation of our blog “The Dark Matter Crisis” on SciLogs.com, it has now been re-opened. You can read the full story about the incident in the post “The Dark Matter Crisis continues: on the difficulties of communicating controversial science“. It is followed by a guest blog post by cosmologist Scott Dodelson: “Scott Dodelson on dark matter and modified gravity (guest post)“.
Furthermore, for those more interested in actual science, have a look at my blog post “Are there two types of dwarf galaxies in the universe?“, explaining some very exciting recent results concerning dwarf elliptical and tidal dwarf galaxies.