The first XMM-Newton observations have revolutionised our view of the cores ofgalaxy clusters. Several objects show a remarkable absence of lines expectedfrom gas cooling below 1-2 keV. This result seems at odds with recentmillimetric observations, which actually reveal that at least some clusters dohost sizeable amounts of cooled matter. Here we propose the observation of aselected sample of 3 galaxy clusters, namely A1068, RXJ0821+07 and A1651, two ofwhich have the best detections of CO so far and the third with X-ray propertiessimilar to those of the first two but showing no evidence of cooled gas.Moreover we will analyze the outer regions of the above systems to ascertain iftheir temperature profiles drop, as suggested by BeppoSAX data, or remain constant.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2003-05-24T16:24:49Z/2003-05-25T00:43:25Z
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 Silvano Molendi, 2004, 'Shedding new light on cooling flow clusters', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-rtuarzf
