|Title||Benchmark Study of the Most Extreme, Diffuse Galaxy Cluster Abell 1631|
|Author||Prof Hans Boehringer|
|Description||Among over thousand X-ray luminous galaxy clusters found in our systematic cluster survey, A1631 is the most extreme, diffuse system, with a number of peculiar properties. It has a very low surface brightness, one of the lowest central ICM densities, and the highest known central entropy. The galaxy distribution shows a surprisingly low concentration parameter and shallow galaxy distribution. Its X-ray luminosity is much lower than the estimate from the Lx-mass relation using the dynamical mass. A first explanation, that this system is in formation, seems not consistent with its high central entropy. It is highly important to understand this extreme and puzzling system at the edge of the morphological distribution through a detailed spectro-imaging study with XMM-Newton.|
|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, 2022-08-20T00:00:00Z, 088071, 19.16_20210326_1200. https://doi.org/10.57780/esa-gm9m2l0|