Jelle Kaastra, Alexis Finoguenov, Fabrizio Nicastro, Enzo Branchini, Joop Schaye, Nico Cappelluti, Jukka Nevalainen, Xavier Barcons, Joel Bregman, Judith Croston, Klaus Dolag, Stefano Ettori, Massimiliano Galeazzi, Takaya Ohashi, Luigi Piro, Etienne Pointecouteau, Gabriel Pratt, Thomas Reiprich, Mauro Roncarelli, Jeremy Sanders, Yoh Takei, Eugenio Ursino
The backbone of the large-scale structure of the Universe is determined by processes on a cosmological scale and by the gravitational interaction of the dominant dark matter. However, the mobile baryon population shapes the appearance of these structures. Theory predicts that most of the baryons reside in vast unvirialized filamentary structures that connect galaxy groups and clusters, but the observational evidence is currently lacking. Because the majority of the baryons are supposed to exist in a large-scale, hot and dilute gaseous phase, X-rays provide the ideal tool to progress our understanding. Observations with the Athena+ X-ray Integral Field Unit will reveal the location, chemical composition, physical state and dynamics of the active population of baryons.
View original:
http://arxiv.org/abs/1306.2324
No comments:
Post a Comment