|Title||Dark matter in elliptical galaxies - mapping the isolated elliptical NGC 4555|
|Author||Dr Ewan O.Sullivan|
|Description||One of the main difficulties in measuring the dark matter content of elliptical galaxies is that the majority are embedded in the dark matter halos of groups and clusters. NGC 4555 is currently the only truly isolated elliptical known to have an extensive dark matter halo, and we propose to follow up our previous Chandra observation with a deep XMM-Newton pointing. We expect to trace the mass profile to virgul130 kpc (5.), allowing determination of parameters such as halo concentration, total system mass, and baryon fraction, which can be compared with the predictions of galaxy simulations. We will also measure the abundance profile, providing insight into the enrichment history of this unusual and important galaxy.|
|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, 2007-07-25T00:00:00Z, 040310, 17.56_20190403_1200. https://doi.org/10.5270/esa-n23s4rd|