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Special Issue "Exploring the Outskirts of Galaxy Clusters"
A special issue of Galaxies (ISSN 2075-4434).
Deadline for manuscript submissions: closed (15 November 2016).
Dear Colleagues,One of the major scientific goals for Athena, the concept for the next-generation European X-ray telescope, recently selected by the European Space Agency(ESA) as a second Large Mission, is to determine how baryons assemble and dynamically evolve into galaxy clusters. The outskirts of galaxy clusters are where the connection between the highest peaks in the comic matter density and the large-scale structure is established. Until recently, more than about 70% of the cluster’s volume, where most of the mass accretion processes onto the main halo is occurring, has remained essentially unexplored. In these regions, the distribution of hot gas (traced with both X-ray and SZ signal) is expected to be clumpy and asymmetric, with non-negligible effects from non-thermal processes (e.g., turbulence, bulk motions, magnetic fields, particle acceleration) that can be also investigated through radio observations. The overall dark matter distribution has started to be mapped through the weak lensing signal and the galaxy distribution, by which the evolution of the properties of the accreting galaxies as the environment changes (from low to high density regions) can also be traced.
This Special Issue of Galaxies is mainly based on the contributions presented during the Symposium 6 at the European Week of Astronomy and Space Science (4-5 July, 2016, Athens, Greece) that has been organized with the aim to discuss the physics and the problems concerning the peripheries of the galaxy clusters, bringing together a number of observers and theorists working on such issues to present up-to-date results from optical, X-ray, SZ data, and numerical simulations, to propose future directions of investigations and to speculate on the prospects of next-generation instruments.
Dr. Dominique Eckert
Dr. Stefano Ettori
Manuscript Submission Information
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