|Title||The Gaseous Halos of Galaxies as Revealed in X-ray Absorption|
|Author||Dr Taotao Fang|
|Description||We propose the first systematic study of the extended X-ray halos of normal galaxies using absorption along the line-of-sight to a carefully-selected quasar. This observation will provide a fundamental test for models of galaxy formation by limiting the fraction of galaxy baryons associated with galaxy halos. By constraining the extent and nature of these halos we will provide important constraints on solutions to the "over-cooling. problem in galaxy formation and inform the missing baryon problem in cosmology. Our proposed exposure time will allow us to probe weak absorption lines down to the level that will for the first time provide meaningful constraints on the hot gas content of galaxy halos.|
|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, 2010-01-17T00:00:00Z, 055438, 17.56_20190403_1200. https://doi.org/10.5270/esa-ucuyd7q|