Galaxies are the basic unit from which larger structures are built, and providean important comparison with more massive, later-forming virialized systems.Their halos also provide an ideal environment in which to studynon-gravitational processes on small mass scales. However, previous work onindividual galaxies has focused on brightest-group or cluster galaxies, whichare embedded in dense gas associated with a larger potential well. We havecarefully selected a small sample of early-type galaxies, free from suchcontaminating emission. We propose to perform a detailed study of the bestnearby example of such a system, combined with observations of two similar butfainter galaxies, in order to establish their properties as a class, which can be compared with group and cluster halos.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2005-01-28T21:29:31Z/2005-01-29T07:52:07Z
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 ALASTAIR SANDERSON, 2006, 'THE HALOS OF INDIVIDUAL EARLY-TYPE GALAXIES', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-bzdynsg
