The nearby cluster Abell 1142 is experiencing an off-axis merger between twosubclusters of roughly equal masses. Each subcluster contains a BrightestCluster Galaxy (BCG). Abell 1142 appears to harbor a cool core with a metalabundance gradient declining outward. This cool core is offset from each BCG byvirgul100 kpc. We propose a moderately deep XMM observation of this unique object toobtain its detailed metal distributions in the central region and probe itsglobal gas properties out to 0.5 R_500. The requested observation will enable usto (1) study the enrichment processes of cluster centers (to distinguish betweenthe BCG and the sub-group infall origins) and (2) understand the role of mergersin the formation and destruction of cluster cool cores.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2016-06-05T03:56:15Z/2016-06-20T02:48:14Z
Version
17.56_20190403_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, Dr Yuanyuan Su, 2017, 'Unveiling a Mysterious Nearby Cool-Core Cluster Lacking a Central BCG', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-lwqtvhy
