The direct detection of the low-energy turnover in the eastern hotspot of6C0905+3955 puts serious constraints on the models of the acceleration process.To detect similar turnovers, and investigate their dependence on luminosity, wehave chosen a sample of large, powerful, distant, FRII radio sources thatcontain huge reservoirs of aged synchrotron plasma, emitting X-rays viainverse-Compton scattering of CMB photons. We aim to exploit XMM.s excellentsoft response and sensitivity to detect this emission and in doing so expand notonly our sample of sources with putative low-energy turnovers in their hotspotsbut also measure the energy contained in the low Lorentz-factor electrons inthese sources, which has important implications for the energy dumped into any group or cluster medium.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2008-05-03T10:48:14Z/2008-09-30T01:05:45Z
Version
17.56_20190403_1200
Mission Description
The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs 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 Earths 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.
European Space Agency, Ms Mary Erlund, 2009, 'The nature of the low energy turnover in powerful FRII sources', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-5404go3
