Sa galaxies have roughly equal amounts of hot and cold gas, yet little is knownabout the interaction between the two phases. It is possible that the gas isthermally coupled, with cold gas cooling hot gas where the two phases interface.This would lead to a softening of the X-ray spectrum in the area of overlap.Alternatively, the phases could be thermally isolated, so that the cold gas infront of the hot gas absorbs soft X-rays behind it. We propose to observe the Sagalaxy ICvirgul5267, which has an unusual HI distribution to search for theinteraction between the two phases of its interstellar medium.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2005-11-05T16:16:36Z/2005-11-06T10:58:28Z
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 Jimmy Irwin, 2006, 'The Interaction of Hot and Cold Gas Within Galaxies', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-nw3nh7a
