|Title||DETERMINING THE TEMPERATURE PROFILES OF CLUSTERS OF GALAXIES ONCE AND FOR ALL|
|Author||Dr JIMMY IRWIN|
|Description||The temperature profile of the hot gas within clusters of galaxies is a crucial quantity for determining the gravitational mass and baryon fraction of a cluster, as well as a potential discriminant between competing cosmological models. Current observations will determine the temperature profiles out to 40% of the virial radius, yet simulations indicate the temperature should drop steeply at larger radii. We propose to test this important prediction for the first time by observing four nearby, bright clusters with four off-center pointings so we can determine the temperature profile out to 100% of the virial radius. This will represent the largest sample to date for which temperature profiles will be determined to a large fraction of the virial radius.|
|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, 2005-02-21T00:00:00Z, 020519, 17.56_20190403_1200. https://doi.org/10.5270/esa-9wouifk|