Every major modern hydrodynamical simulation suite now includes a prescriptionfor AGN feedback to reproduce realistic populations of galaxies. However, thesesimulations generally do not offer much insight into the nature of feedback. Onthe other hand, the hot gas content of galaxy groups is highly sensitive to theimplemented feedback scheme: the predicted gas fraction differs by an order ofmagnitude from one simulation to another. Here we propose to observe a sample of40 galaxy groups exhibiting X-ray emission on scales >12, with the aim ofproviding benchmark thermodynamic and gas fraction profiles out to R500 withoutrequiring any extrapolation. The proposed program will gather a well controlledsample of systems spanning an order of magnitude in mass 1e13 < M500 < 1e14 Mo.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2022-06-12T02:21:38Z/2022-12-31T03:35:27Z
Version
20.09_20221024_1724
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, Dr Dominique Eckert, 2024, 'Galaxy groups as the ultimate probe of AGN feedback', 20.09_20221024_1724, European Space Agency, https://doi.org/10.57780/esa-d7dlw6l
