Galaxy groups are ideal systems to study baryon physics, which is important forboth using clusters for precision cosmology and understanding galaxy formationand evolution. Over the last decade, our understanding on the ICM properties ofgalaxy groups has been greatly improved. However, we still know little aboutlow-mass groups with M_{500}<10^13 h^-1 M_sun (or kT < 0.7 keV). Such low-massgroups are the lightest massive halos that can still hold significant amount ofbaryons. They are the ideal systems to examine the departures of scalingrelations from a simple power law that are expected in simulations. This XMMproposal is a first step to select low-mass groups with M_{500}=3 - 10 x 10^12h^-1 M_sun and the requested data are sufficient for some scaling relations.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2011-10-14T20:29:23Z/2012-04-27T13:55:00Z
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 Ming Sun, 2013, 'Finding low-mass groups to extend the cluster scaling relations', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-h21lz0o
