|Title||THE HALOS OF INDIVIDUAL EARLY-TYPE GALAXIES|
|Author||Dr ALASTAIR SANDERSON|
|Description||Galaxies are the basic unit from which larger structures are built, and provide an important comparison with more massive, later-forming virialized systems. Their halos also provide an ideal environment in which to study non-gravitational processes on small mass scales. However, previous work on individual galaxies has focused on brightest-group or cluster galaxies, which are embedded in dense gas associated with a larger potential well. We have carefully selected a small sample of early-type galaxies, free from such contaminating emission. We propose to perform a detailed study of the best nearby example of such a system, combined with observations of two similar but fainter galaxies, in order to establish their properties as a class, which can be compared with group and cluster 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, 2006-02-19T00:00:00Z, 020097, 17.56_20190403_1200. https://doi.org/10.5270/esa-bzdynsg|