|Title||Merger Shocks and the Origin of the Large X-ray vs. SZ Discrepancy in Abell 611|
|Author||Prof Craig Sarazin|
|Description||We propose the first useful XMM observation of the CLASH cluster Abell 611. We have imaged the Sunyaev-Zel.dovich (SZ) effect using MUSTANG (9" res) and Bolocam (1. res). The high resolution MUSTANG SZ image shows an excess south of the cluster center that is likely to be a merger shock. The MUSTANG+Bolocam image was used to derive the cluster pressure profile, which is 3x greater than that from the Chandra X-ray data. This is the largest discrepancy seen in any clusters we have observed. We will use the XMM observation to establish the nature of the southern SZ excess, and determine the dynamical state of the cluster. The origin of the SZ vs. X-ray discrepancy will be found; this is important as a test of X-ray or SZ mass proxies for clusters in cosmological studies.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|Mission Description||The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2018-05-22T22:00:00Z, 078159, 17.56_20190403_1200. https://doi.org/10.5270/esa-5jf2k8a|