A remarkable recent development is the discovery of cold fronts at very largeradii in the Perseus cluster, that are much older than those in cluster cores.Because of this, diffusion processes have had much longer to broaden the edge,while instabilities have had longer to grow. Recently we extended the XMM mosaicof Perseus to reach the virial radius to the west, and have confirmedsuggestions from ROSAT that the sloshing extends to the virial radius.Remarkably, our new XMM mosaic shows 2 edges near the virial radius. However weare only seeing a small section of them\: the full scale of the sloshing is yetto be revealed. We propose 4 observations to extend the Perseus mosaic to fullycover the sloshing near the virial radius, and fully reveal the extent of the mysterious double edge.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2020-08-20T00:14:19Z/2020-09-09T03:01:59Z
Version
18.02_20200221_1200
Mission Description
The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
European Space Agency, Prof Stephen Walker, 2021, 'A complete view of the sloshing activity in the Perseus cluster', 18.02_20200221_1200, European Space Agency, https://doi.org/10.57780/esa-t8u3ozr
