Mar 15 – 20, 2020
Europe/Berlin timezone

Large scale view of the Abell 3391/95 multiple galaxy cluster system

Mar 17, 2020, 2:50 PM


Oral Presentation Clusters and Cosmology II


Prof. Thomas Reiprich (Argelander-Institut für Astronomie, Universität Bonn)


We present the large-scale multi-wavelength view of the nearby (z~0.05) Abell 3391/95 multiple galaxy cluster system. We have obtained (i) the first deep (~10 ks nominal) large-area (~10 sq.deg) high-quality X-ray data using eROSITA in scan mode during its Performance Verification Phase; (ii) an even larger scale sensitive (~30 uJ) radio continuum image obtained with ASKAP as part of the EMU Early Science observations; (iii) dedicated DES-depth DECam pointed observations covering the full eROSITA scan region. The eROSITA data reveal in detail the gas bridge connecting the A3391 cluster and the A3395n/s double cluster as well as a number of infalling matter clumps surrounding the entire system, and, of course, many background AGN, galaxy groups, and clusters. Relativistic plasma from a variety of sources is detected in the ASKAP image, including wide angle tail galaxies tracing relative motions to the hot gas in the system, and possible radio relics. Those structures are traced by the galaxy distribution as characterized in the deep multicolor DECam images. Here, we provide an overview of the data and first science results.

Presenter status eROSITA consortium member

Primary author

Prof. Thomas Reiprich (Argelander-Institut für Astronomie, Universität Bonn)


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