The cluster X-ray luminosity-temperature (L-T) relationship is sensitive to cooling and feedback processes. Because L and T are used as surrogates for thecluster virial mass M in cosmological studies, understanding the L-T and the L-T-M relations-including scatter and its evolution, is critical for cluster constraints on cosmological models, as well as models of galaxy and cluster evolution. We propose to measure T and L for a representative sample of 13 lowluminosity, low-T (2-2.6 keV) clusters of galaxies at moderate redshift (z=0.32-0.37), from the ROSAT 160SD survey. We will study the L-T-M relation for 6 clusters with weak lensing masses obtained with HST. This study spans the massrange between rich clusters and groups, where feedback becomes important.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2010-01-06T18:55:23Z/2010-04-23T21:49:54Z
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, 2011, 'Virgo Clusters At Redshift 0.35: Probing the Cluster-Group Transition', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ejklyqb
