We propose a unique XMM study of 7 galaxy groups selected by UV absorption inHST/COS spectra. Combining XMM observations and UV absorption spectroscopy ofthese group will yield new constraints on the state of the intra-group medium.The targets are similar in velocity dispersion (sigmavirgul300-500km/s) and richness.All have broad Ly-a absorption, and but only 4 have detectable OVI absorption.The 3 groups with XMM observations show that two with OVI are associated withclear X-ray dominant groups, while the other with no OVI is not. We will testthe ideas from numerical simulations, where the relationships betweenthermodynamic properties of the hot gas and the presence of multiphase gasdepend significantly on feedback mechanisms, merger history, and star formation history.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2020-10-07T10:09:04Z/2020-10-11T18:21:09Z
Version
18.02_20200221_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, Prof Megan Donahue, 2021, 'Hot Gas in Low Redshift comma Massive OVI+Ly-Alpha Absorption-Line Systems', 18.02_20200221_1200, European Space Agency, https://doi.org/10.57780/esa-tcftkig
