|Title||Understanding the Nature and Environment of Ultra-Steep Spectrum Radio Relics|
|Author||Dr Scott Randall|
|Description||We propose follow-up observations of three galaxy clusters containing ultra-steep spectrum (USS) radio relic sources that have existing low-frequency GMRT observations. Comparing the morphology and thermal structure of the ICM to the diffuse radio emission will allow constraints to be placed on the nature of these relatively poorly studied sources. For example, a correlation between merger shocks and radio emission implies direct shock acceleration, as with classical radio relics, whereas a lack of correlation in a disturbed system suggests acceleration of an existing particle population by adiabatic compression.|
|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, 2019-08-24T22:00:00Z, 082169, 17.56_20190403_1200. https://doi.org/10.5270/esa-uogus5s|