|Title||Hot gas and magnetic fields as sensitive tracers of galactic interactions|
|Author||Dr Matthias Ehle|
|Description||We propose a study of the hot gas distribution in two galaxies suspected to undergo ram pressure effects: an apparantly isolated spiral NGC 4414 and a Virgo Cluster object NGC 4254. The proposed targets show only weak signs of external influences in the optical domain. However, their magnetic fields, tracing the diffuse ionized gas, show strong effects of external influences. We propose a study of the hot diffuse X-ray emitting gas to build up a physical scenario of their interactions and to distinguish between basic interaction mechanisms: gravitational encounters and the ram pressure stripping. The second possibility implies that the ablation by the external gas may be important even in galaxies thought to be isolated or those located in cluster outskirts.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|Mission Description||The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2004-07-20T00:00:00Z, 014761, 17.56_20190403_1200. https://doi.org/10.5270/esa-zsel64h|