|Title||MEASURING ICM TEMPERATURES AT LARGE RADII IN RICH CLUSTERS OF GALAXIES|
|Author||Dr SABRINA DE GRANDI|
|Description||The radial temperature profile of the X-ray emitting intra-cluster medium (ICM) is a key observable in determining the total mass of galaxy clusters. To date different studies (ROSAT, ASCA and BeppoSAX) have found conflicting results regarding temperature gradients in clusters and no firm results have been obtained from recent XMM-Newton analysis of a few pointed observations of clusters. We propose to observe the outer cluster regions (i.e. larger than 50%-60% of the virial radius), of three nearby relaxed clusters, to definitely asses whether a temperature decline is present in these regions and, in presence of a gradient, to determine the slope of the temperature profile, which carries important information on the thermodynamical status of the ICM.|
|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, 2005-04-17T00:00:00Z, 020557, 17.56_20190403_1200. https://doi.org/10.5270/esa-maq5b57|