GBT25B-185

SZ Cavities and Shocks in ACT-CL J0930: A high-z cluster case study

Abstract

We propose a high-resolution imaging campaign targeting the Sunyaev-Zel'dovich (SZ) effect in the exceptional galaxy cluster ACT-CL J0930+0615, located at a z=1.28. Initial MUSTANG-2 observations reveal striking features, including merger-driven shock fronts, AGN-driven "SZ cavities," and an elongated ICM morphology. By tripling the sensitivity of previous observations, this program aims to confirm these structures and enable a detailed analysis of the underlying physical processes. Combined with complementary datasets, including MeerKAT radio, archival Chandra and XMM-Newton X-ray observations, and low-resolution SZ data from ACT, this study will provide an in-depth study of the interaction between thermal and non-thermal components in this massive yet still forming system. Our work will yield critical insights into shock heating, particle (re)acceleration, and turbulence, offering a deeper understanding of the thermalization of the Universe during a pivotal epoch of structure formation.

Investigators

Name	Institution
Joshiwa van Marrewijk *	Leiden, University of
Tony Mroczkowski	European Southern Observatory; Institut de Ciències de l'Espai
Luca Di Mascolo	Kapteyn Astronomical Institute; Max-Planck-Institut für Astrophysik; Trieste, Università degli Studi di
Simon Dicker	Pennsylvania, University of
Saianeesh Haridas	Pennsylvania, University of
IAN LOWE	Arizona, University of; Pennsylvania, University of
Brian Mason	National Radio Astronomy Observatory
Emily Moravec	Green Bank Observatory; Akademie ved Ceske republiky
John Orlowski-Scherer	Pennsylvania, University of; McGill University
Charles Romero	Pennsylvania, University of; Virginia, University of; Center for Astrophysics | Harvard & Smithsonian
Eleonora Barbavara	Roma La Sapienza, Università degli Studi di
Giovanni Isopi	Roma La Sapienza, Università degli Studi di
Craig Sarazin	Virginia, University of
Dakalo Phuravhathu	Witwatersrand, University of the
Mark Devlin	Pennsylvania, University of
Bruce Partridge	Haverford College
John Hughes	Rutgers, The State University of New Jersey
Nicholas Battaglia	Cornell University; Toronto, University of
Adam Hincks	Toronto, University of
Ajay Gill	Toronto, University of
Matt Hilton	KwaZulu-Natal, University of; Witwatersrand, University of the
Huub Rottgering	Leiden, University of
Reinout van Weeren	Center for Astrophysics | Harvard & Smithsonian; Leiden, University of
James Petley	Leiden, University of
Jonathan Sievers	Toronto, University of; McGill University; Princeton University; KwaZulu-Natal, University of
Karen Perez Sarmiento	Pennsylvania, University of

* indicates the PI