We propose XMM EPIC observations of 3 typical X-ray selected galaxy groups. Ourobjects are both bright and sufficiently distant (z=0.10-0.13) so that they eachcan be detected to their virial radius in a single pointing. The XMMobservations will provide accurate mass profiles to r_500. In combination withthe already obtained optical observations, we will be able to establish thebaryon budget in T = 2 keV groups, accurately calibrating the M-T relation atgroup scale, and quantifying any trends in the baryon fraction from richclusters to groups. These data will have important implications for the thermalhistory of the intergalactic medium and cluster-based cosmological tests,complementing ongoing cluster surveys focusing on rich clusters.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2004-04-23T21:02:33Z/2004-10-27T14:00:45Z
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, Dr ALLAN HORNSTRUP, 2005, 'BARYON BUDGET IN 2 KEV GALAXY GROUPS', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-r65uut2
