Summary

We have obtained MRS/MIRI JWST cycle 3 observations of Brightest Cluster Galaxies (BCGs) : Program 5018, PI : P. Salomé. The observations start in January 2025. This JWST project will provide insights into multiphase gas at different scales. The goal is to characterise the morphology, the dynamics and the excitation of multiphase gas (ionised and molecular) in these galaxies. It will be carried out by our group at LERMA, IAP and LPENS, in collaboration with a team at Michigan State University (US) and colleagues in UK. By tracing the circulation of baryonic matter in BCGs, the project will shed light on two crucial stages of the AGN- feedback cycle : (i) the formation of molecular filaments (in the extreme environment of the BCG with hot gas, high cosmic-ray rates, and high turbulence), followed by (ii) the formation of a central molecular disk potentially feeding the central AGN.

Preliminary schedule:

Day 1

Welcome
The JWST Cycle 3 GO 5018 project goals P. Salomé LUX
Spitzer H2 observations of BCGs : H2 and SFR M. Donahue Michigan
Session Observations
Imaging
MIRI preliminary results of 6 BCGs from GO 5018. I. Beslic LUX
NIRCAM Abell 2597 seen by the Cycle 2 JWST GO 4094 G. Tremblay SAO Spectroscopy
MRS preliminary results of 6 BCGs from GO 5018 P. Guillard IAP
NIRSPEC Abell 2597 seen by the Cycle 2 JWST GO 4094 O. Omoriyi SAO

Day 2

Modelling
Modelling cool core clusters with CLOUDY G. Ferland Kentucky
Modelling H2 emission with the Meudon-PDR code B. Godard LPENS
Modelling cool core clusters with RAMSES R. Beckmann Edinburgh
Follow-ups ALMA observations of N1275 V. Olivares Chile
IFU Observations (Weave, MUSE) A. Edge Durham

Day 3

Cooling flows and Black-Hole fueling
Cool core clusters A. Fabian IoA
Stimulated cooling B. McNamara Waterloo
Precipitation model M. Voit Michigan
Discussions
JWST program and follow-ups All