Cafe on monday january the 12th

Hello everybody,

we start the first Cafe of the new Year with a joint presentation from Kumiko and myself: we will discuss the recent paper

http://arXiv.org/abs/0812.0597

from Jeltema, Kehayas and Profumo on gamma rays from clusters of galaxies, produced from cosmic rays and dark matter annihilation.

Gianfranco has proposed a paper by C. Alard

http://arXiv.org/abs/0901.0344

on a peculiar lensed system which seems to be compatible only with dark matter matter envelope around luminous objects, the discrepancy between light and gravitational mass being very hard to explain in modified gravity models.

If you have noticed any interesting paper in the last month please don't be shy and post it for our Cafe!

See you on monday same time, same place

Salut, and a cold and shining weekend.