|Title||Gas clumping in the outskirts of Hydra A and A2142|
|Author||Dr Dominique Eckert|
|Description||Galaxy cluster outskirts are the regions where structure formation occurs through the accretion of smaller structures along large-scale filaments. Recently, it has been claimed both from observations and numerical simulations that an important fraction of the infalling material should be in the form of dense clumps. If this is the case, we argue that a sufficiently long XMM observation should allow us to detect these clumps and distinguish them from point sources. We propose 8 25 ks observations of the outskirts of Hydra A and A2142, which were selected based on their high azimuthal scatter in ROSAT observations. The proposed program will allow us to set constraints on the existence of dense clumps down to a flux of 2e-15 ergs cm-2 s-1 (0.5-2.0 keV band) and a scale of 10-80 kpc.|
|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, 2013-08-04T00:00:00Z, 069444, 17.56_20190403_1200. https://doi.org/10.5270/esa-252oev7|