We propose a 132 ksec XMM-Newton observations of ZwCl 1234.0+02916 (z=0.2214), amerging galaxy cluster where one of the BCGs hosted the short GRB 050509B. OurChandra observation shows a bimodal structure, with a possible cold front at thewestern edge, indicating that the two subclusters are moving away from oneanother after first core passage. Our weak lensing analysis shows that the darkmatter is also bimodal, and is centered on the two galaxy distributions, whilethe X-ray gas lags behind (like the Bullet cluster). XMM data will confirm thebimodal structure and will allow the measurement of the merger velocity and thestudy of the segregation of dark and baryonic matter. This is likely to be ahigh velocity collision which will constrain dark matter.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2013-12-04T14:43:04Z/2013-12-09T03:26:04Z
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, Prof Craig Sarazin, 2015, 'The Burst Cluster: Dark Matter in a Merging Cluster Host of the Short GRB050509B', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-tylep10
