|Title||Unveiling the Nature of Fossil Groups with XMM-HST: Looking at the Progenitors|
|Author||Dr renato dupke|
|Description||Even though the first fossil group (FG) was discovered almost three decades ago their origin and evolution still remain unclear. The popular explanation that they are cannibalistic remains of groups that lost energy through dynamical friction is not consistent with their typically lack the expected large cool cores. We have raised a representative sample of FGs with high quality X-ray and optical data and developed a robust technique to estimate their relative age and dynamical stage using the ICL. The inital results have been surprising and highlighted the need to collect data from evolutionary phases prior to FG formation (FG progenitors or FPs) to understand their origin. Here, we propose short XMM observations of the 2 brightest and most informative FPs.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN|
|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, 2022-05-13T00:00:00Z, 088341, 19.17_20220121_1250. https://doi.org/esa-[xxxxxxx]|