GBT24A-249

Resolving SZ-selected clusters in the epoch of most rapid cluster growth

Abstract

Sunyaev-Zeldovich (SZ) surveys are currently the most powerful and consistent method of detecting high-mass, high-z galaxy clusters, which are uniquely sensitive to cosmology and the growth of structure in our Universe. This proposal aims to investigate a pilot sample that comprises 7 massive ACTPol-selected galaxy clusters with redshifts greater than 1.25, observed during the nighttime this semester using the GBT. This endeavor presents a unique opportunity to explore the thermodynamic properties of such high-mass, high-redshift galaxy clusters in an epoch currently unexplored in the (sub)mm regime.

Our objects are: (1) To jointly model relatively short Mustang-2 observations (~100-1000 times shorter than comparable X-ray integration times) with public single-dish ACT observations to model the pressure distribution of the intracluster medium from the core to the virial radius. (2) With these de-projected pressure profiles, we will map each cluster's dynamical state and morphology and search for evolutionary trends when compared to local surveys. (3) Search for mergers and shock-fronts in this violent formation epoch, only accessible through high-spatial resolution Mustang-2 observations.

Investigators

Name	Institution
Joshiwa van Marrewijk *	Leiden, University of
Emily Moravec	Green Bank Observatory; Akademie ved Ceske republiky
Simon Dicker	Pennsylvania, University of
Tony Mroczkowski	European Southern Observatory; Institut de Ciències de l'Espai
IAN LOWE	Arizona, University of; Pennsylvania, University of
Luca Di Mascolo	Max-Planck-Institut für Astrophysik; Trieste, Università degli Studi di
Charles Romero	Pennsylvania, University of; Virginia, University of; Center for Astrophysics | Harvard & Smithsonian
Brian Mason	National Radio Astronomy Observatory
John Orlowski-Scherer	Pennsylvania, University of; McGill University
Saianeesh Haridas	Pennsylvania, University of
Adam Hincks	Toronto, University of
Mark Devlin	Pennsylvania, University of
Sankalp Choudhuri	European Southern Observatory; München, Technische Universität; Indian Institute of Science Education and Research, Pune
Nicholas Battaglia	Cornell University; Toronto, University of
John Hughes	Rutgers, The State University of New Jersey
Karen Perez Sarmiento	Pennsylvania, University of
Julia Robe	Pennsylvania, University of
Tanay Bhandarkar	Pennsylvania, University of
Ajay Gill	Toronto, University of
Matt Hilton	KwaZulu-Natal, University of; Witwatersrand, University of the
Bruce Partridge	Haverford College
Craig Sarazin	Virginia, University of
Jonathan Sievers	Toronto, University of; McGill University; Princeton University; KwaZulu-Natal, University of
Bradley Johnson	Virginia, University of

* indicates the PI