| Proposal ID | 078233 |
| Title | Unveiling a Mysterious Nearby Cool-Core Cluster Lacking a Central BCG |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0782330101 |
| DOI | https://doi.org/10.5270/esa-lwqtvhy |
| Principal Investigator, PI | Dr Yuanyuan Su |
| Abstract | 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 by~100 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. |
| Publications |
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| 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2017-07-12T22:00:00Z |
| Last Update | 2025-08-04 |
| Keywords | "XMM", "abell 1142 appears", "Abell 1142", "moderately deep xmm", "infall origins", "axis merger", "metal distributions", "roughly equal masses", "central region", "global gas properties", "cool core", "enrichment processes", "central bcg", "cluster centers", "cluster cool cores" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | 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 |