PIs: Ray Norris (WSU/CASS), Thomas Reiprich (Bonn)
Australian Collaborators: Gianni Bernardi, Gianfranco Brunetti, Rossella Cassano, Stefan Duchesne, Chiara Ferrari, Bill Forman, Melanie Johnston-Hollitt, Susannah Keel, Andrew O’Brien, Chris Riseley, Tiziana Venturi, Amanda Wilber
eROSITA Collaborators: Kaustuv Basu, Marcus Brueggen, Esra Bulbul, Klaus Dolag, Dominique Eckert,Thomas Erben, Vittorio Ghirardini, Duy Hoang, Florian Kaefer, Melih Kara, Juergen Kerp, Matthias Klein, Konstantinos Migkas, Naomi Ota, Florian
Australian Surveys/Instruments: ASKAP/EMU
Summary: A combined radio/X-ray study of the Abell 3391/95 field including; (i) the connection between potential shocks identified in hot group and cluster gas and radio relics, (ii) the relation between potential turbulence in group and cluster gas as well as in the bridge of gas between the A3391/95 clusters and the potential co-spatial populations of (re-) accelerated relativistic particles, and (iii) the interaction of wide angle tail (WAT) galaxies with warm/hot gas properties and their relative motions. The primary data sets were the eROSITA PV Phase observation as well as the ASKAP/EMUEarly Science observation of this field.
Radio observations of the merging galaxy cluster system Abell 3391-Abell 3395
The eROSITA view of the Abell 3391/95 field: The Northern Clump. The largest infalling structure in the longest known gas filament observed with eROSITA, XMM-Newton, and Chandra
PIs: Velibor Velovic (WSU), Mara Salvato (MPE)
Australian Collaborators: Miroslav Filipovic, Luke Barnes, Ray Norris
eROSITA Collaborators: Thomas Reiprich, Kirpal Nandra, Sophia Waddell
Australian Surveys/Instruments: ASKAP, MWA and ATCA
Summary: Our goal was to understand the origin and evolution of the newly discovered recollimating jets in the nearby massive elliptical galaxy NGC 2663. These jets span a total of 355 kpc around the nearby elliptical galaxy NGC 2663, and the possible first detection of recollimation on kiloparsec scales. The small distance to the galaxy (~28.5 Mpc) allowed us to resolve portions of the jets to examine their structure. We combined multiwavelength data – radio observations by the MWA, the ASKAP and theATCA, and X-ray data from Chandra, Swift and SRG/eROSITA. We presented intensity, rotation measure, polarisation, spectral index and X-ray environment maps. Regions of the southern jet show simultaneous narrowing and brightening, which can be interpreted as a signature of the recollimation of the jet by external, environmental pressure, though it is also consistent with an intermittent AGN or complex internal jet structure. X-ray data suggest that the environment is extremely poor, and if the jet is indeed recollimating, the large recollimation scale (40 kpc) would be consistent with a slow jet in a low-density environment.
Publication: Collimation of the kiloparsec-scale radio jets in NGC 2663
Publicity: Astronomers have detected one of the biggest black hole jets in the sky