It now seems that the morphology-density relation is established by processesoperating within groups, and only subsequently incorporated into clusters. Therecent discovery that the HI-deficiency observed in galaxies within compactgroups is related to the presence of a hot intergalactic medium, offers a clueto the processes involved in the transformation of the galaxy population. Wepropose to image a set of HI-deficient groups with XMM and Chandra, to comparethe X-ray morphology with the HI distribution mapped by the VLA. This willenable us to discriminate between ram pressure stripping, tidal stripping andstarburst mechanisms for the removal of gas from galaxies.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2004-07-03T02:53:11Z/2004-07-03T07:34:58Z
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 TREVOR PONMAN, 2005, 'HI-DEFICIENT COMPACT GALAXY GROUPS', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-uff11ds
