Speaker
Dr
Erwin Lau
(University of Miami)
Description
Gas clumping in the outskirts of galaxy clusters is one of the major unexplored astrophysics in cluster formation. We present the first statistical constraint on gas clumping with the combined X-ray angular power spectra measured from the ROSAT All-Sky Survey and the Chandra/XBootes field. The gas clumping factor of group and clusters at < R200m is constrained to be C = 1.7 +1.8/-0.5 at the the 1 sigma level, consistent with previous measurements of clumping in individual clusters. We discuss how to improve constraints on gas clumping and other ICM physics (such as non-thermal pressure and feedback from active galactic nuclei) with ongoing and upcoming X-ray (such as eRASS), microwave, and gravitational lensing observations.
Primary authors
Prof.
Nico Cappelluti
(University of Miami)
Alexander Kolodzig
(Institut d'Astrophysique Spatiale (CNRS/ Université Paris Sud))
Dr
Erwin Lau
(University of Miami)
Prof.
Daisuke Nagai
(Yale University)
Dr
Masato Shirasaki
(NAOJ)