Bologna 10-12 Oct. 2018
Promoting interactions around interacting galaxy clusters
A collaborative workshop for people actively involved or interested in a fast growing topic in galaxy cluster studies: the early interaction stage of merging objects, which can shed new light on the thermal and on the non thermal properties of the most diluted baryons in the Cosmic Web.  The workshop is fully supported by the ERC StG "Magcow". 
Highlights

Topics

Speakers (invitation only due to space restrictions)

       ​​​​​​


K. Dolag
P. Mazzotta
H. Bourdin

​G. Brunetti
N. Aghanim
S. De Grandi

A. Bonafede
S. Ettori

​A .Simionescu
V. Ghirardini
H. Akamatsu

    
       ​​​​​​​​​​​​​


A. Botteon
N. Locatelli
R. Van Weeren
C. Gheller
D. Wittor
​A. De Graaff
​F. Degasperin

G. Bernardi  
J. Donnert 
P. Dominguez-Fernandez
D. Dallacasa

​M. Hoeft

    
    
1. Which physical conditions should be expect for the gas and magnetic fields in these early interacting regions? What are the challenges to ​​​​​ simulate/observe them? ​

2. Which new observational features should we expect (or might have already seen) in these regions? (strong non thermal pressure? inverse compton? unexpected magnetic fields? puzzling radio spectra? high metallicity?) 

3. Which sensitivities (or statistics) will be required  in X-ray/radio/SZ to improve our understanding of thees regions? Would stacking or deeper observations of single objects be best here?
       ​​​​​​​​​​
SOC :
       
F. Vazza
D. Eckert
M.Brüggen

LOC: 
F.Vazza and 
Fondazione Alma Mater
   
 
Program (to be defined)
Tentative format:
25 speakers
~20 minutes talk including question time, slots for discussion, best in front of cookies and coffees. 
4 main sub-topics:
a) X-ray; b) radio; c) SZ; d) simulations
Venue
The meeting will be held in "Sala Rossa" of Palazzo Marchesini, Via Marsala 26  in the historic centre of Bologna. 
  1. 10 October - Day 1
    10 October - Day 1
    10 October 2018
    To be defined
  2. 11 October - Day 2
    11 October - Day 2
    11 October 2018
    To be defined
  3. 12 October - Day 3
    12 October - Day 3
    12 October 2018
    To be defined
​Clusters ongoing mergers (but before they really merge...)
A number of observations and related theoretical works have recently highlighted a number of unexpected effects in the outer regions of galaxy clusters in a very early merging state. In such systems, before the major merger could really dissipate all its energy via shocks and turbulence. Such peripheral regions are very elusive, yet they might now become observable during the early stage of mergers (due to the enhancement of emission due to compression), especially thanks to the increased sensitivity of serveral new radio telescopes (e.g. LOFAR, MWA etc). The interpretation of these features, and the accurate prediction of the physics there also poses theoretical challenges to simulations. 
A minimal (growing) list of papers that look relevant to the aims of the workshop: