GBT19A-092

MUSTANG2 Imaging of the AGN-driven Cavities in MS 0735.6+7421

Abstract

Many galaxy clusters are apparently relaxed on large scales, but have within their cores powerful bubbles caused by AGN outbursts. Such outbursts produce giant cavities seen in X-ray observations filled with radio emission at low frequencies; these cavities are thought to be supported by magnetic fields, ultra-hot thermal gas, or cosmic rays. We propose deep GBT+MUSTANG2 observations to image the bubbles in the MS 0735.6+7421 placing strong constraints on their thermal SZ effect signature.
Recently, these bubbles were detected in CARMA-23 30GHz observations. While detecting a bubble through the SZ effect is a major milestone, imaging is required in order to understand the physics that drive them. MUSTANG2's sensitivity and angular resolution make it capable of performing such studies, which will reveal the bubble's composition and the nature of the pressure support that displaces such a large amount of gas from hydrostatic equilibrium. These observations will also determine whether the bubbles are supersonically by measuring the putative shock front. All this will shed new light on the energetics of AGN feedback, which is a key open problem in the current astrophysical studies of galaxy clusters and massive galaxies.

Investigators

Name	Institution
Tony Mroczkowski *	European Southern Observatory; Institut de Ciències de l'Espai
Simon Dicker	Pennsylvania, University of
Sara Stanchfield	Pennsylvania, University of
Brian Mason	National Radio Astronomy Observatory
Charles Romero	Pennsylvania, University of; Virginia, University of; Center for Astrophysics | Harvard & Smithsonian
Erik Reese	Pennsylvania, University of; Moorpark College
Theodore Macioce	California Institute of Technology
Michael Wise	Netherlands Institute for Radio Astronomy; Amsterdam, Universiteit van
Christoph Pfrommer	Potsdam, Leibniz-Institut für Astrophysik
Robert Laing	Square Kilometre Array
Eugene Churazov	Max-Planck-Institut für Astrophysik
Gabriel Pratt	Commissariat à l'Energie Atomique
Helen Russell	Nottingham, University of
Jens Erler	Bonn, Universität
Kaustuv Basu	Bonn, Universität
Adam Mantz	Stanford University
Elizabeth Blanton	Boston University
Esra Bulbul	Center for Astrophysics | Harvard & Smithsonian
Norbert Werner	Masarykovy Univerzity
Luca Di Mascolo	Kapteyn Astronomical Institute; Max-Planck-Institut für Astrophysik; Trieste, Università degli Studi di
Remi Adam	Centre National de la Recherche Scientifique
Massimo Gaspari	Princeton University; Universita degli Studi di Modena e Reggio Emilia
Adrian Vantyghem	Waterloo, University of
Rashid Sunyaev	Max-Planck-Institut für Astrophysik
Mark Devlin	Pennsylvania, University of
Tracy Clarke	Naval Research Laboratory
Craig Sarazin	Virginia, University of
Jonathan Sievers	Toronto, University of; McGill University; Princeton University; KwaZulu-Natal, University of
James Aguirre	Pennsylvania, University of
Jack Sayers	California Institute of Technology

* indicates the PI