We propose to complete a unique XMM study of 7 galaxy groups selected by UVabsorption in HST/COS spectra of background quasars. Combining X-ray and UVobservations of these groups will yield new constraints on the state andlocations of the systems. baryons. The groups are similar in velocitydispersion (virgul300-500 km/s) and richness. All have broad Ly-alpha absorption, andbut only 4 have detectable OVI absorption. XMM observations show that 2 withOVI are associated with clear X-ray dominant groups, while the other observed 3,lacking OVI, are not. We are proposing to observe the remaining twoOVI-absorbing systems. We will test predictions from current numericalsimulations for thermodynamic properties of multiphase gas, feedback mechanisms, merger history, and star formation history.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2022-08-17T12:04:49Z/2022-09-12T10:34:47Z
Version
20.08_20220509_1852
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, Prof Megan Donahue, 2023, 'Hot Gas in Low Redshift comma Massive OVI/Lyman-Alpha Absorption Line Systems', 20.08_20220509_1852, European Space Agency, https://doi.org/10.57780/esa-669goh0
