GBT24A-291

Quantifying biases in selection functions of Sunyaev-Zel'dovich Effect surveys.

Abstract

This proposal aims to make the first direct measurement of how many galaxy clusters are being missed by Sunyaev-Zel'dovich Effect (SZE) surveys due to sources, a number that is not accurately known. We propose to do this by making shallow maps of clusters from the eFEDS X-ray cluster catalog that are missing from the Atacama Cosmology Telescope (ACT) DR5 catalog even though they have masses, redshifts, and locations in the ranges where they should be included. The sample of 96 clusters is complimentary to our recently completed MUSTANG2 survey of DR5 clusters and when combined, the two samples will be able to put strong limits on the nature and evolution of sources in clusters and it will tell us if the source population between X-ray and SZE selected clusters is the same. Knowledge of the statistics of this population is vital in allowing current and future cluster surveys to reach their potential and obtain sub-percent values of cosmological constants. Currently most of our knowledge of compact sources in clusters requires extrapolation over 1 to 2 orders of magnitude in frequency. Observations from MUSTANG2 offer a chance to get a direct measurement at the frequencies that matter to SZE experiments.

Investigators

Name	Institution
Simon Dicker *	Pennsylvania, University of
Brian Mason	National Radio Astronomy Observatory
IAN LOWE	Arizona, University of; Pennsylvania, 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
Charles Romero	Pennsylvania, University of; Virginia, University of; Center for Astrophysics | Harvard & Smithsonian
John Orlowski-Scherer	Pennsylvania, University of; McGill University
Emily Moravec	Green Bank Observatory; Akademie ved Ceske republiky
Tanay Bhandarkar	Pennsylvania, University of
Saianeesh Haridas	Pennsylvania, University of
Craig Sarazin	Virginia, University of
Matt Hilton	KwaZulu-Natal, University of; Witwatersrand, University of the
Nicholas Battaglia	Cornell University; Toronto, University of
Karen Perez Sarmiento	Pennsylvania, University of
Mark Devlin	Pennsylvania, University of
Jonathan Sievers	Toronto, University of; McGill University; Princeton University; KwaZulu-Natal, University of

* indicates the PI