The cluster X-ray L-T relationship is sensitive to feedback processes. Because Land T are used as surrogates for the cluster virial mass M, understanding theL-T and the L-T-M relations and their scatter is critical for clusterconstraints on cosmological models, as well as models of galaxy and clusterevolution. We originally proposed to measure Lx and Tx for a representativesample of 13 low-Lx, low-T (2-2.6 keV) clusters at z=0.32-0.38, selected fromthe ROSAT 160SD survey. We will show the L-T-M relation for 6 of these clusterswith weak-lensing masses obtained with HST. These clusters span the mass rangebetween rich clusters and groups, where feedback processes play an increasinglydominant role. This is a resubmission of an accepted proposal, to repeat 2 of 8 observations.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2013-04-03T06:36:34Z/2013-04-28T19:17:27Z
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, Prof Megan Donahue, 2014, 'Virgo Clusters at Redshift 0.35', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-9on3euy
