Recent efforts to model the formation of disk galaxies have focused on thedissipative collapse of the disk inside a dark matter halo, and suggest thathigh and low surface brightness disks (HSBs and LSBs) form from low and highangular momentum halos, respectively. If correct, the largest LSBs reside inhalos with mass comparable to those of poor groups of galaxies, while HSBsreside in much less massive halos. We propose to observe three giant diskgalaxies, two LSBs and one HSB, with the EPIC pn camera on XMM with thefollowing goals: (1) to measure the hot gas to stellar mass ratio,(2) to probe the dark halo structure and density profile in low and high angular momentumsystems, and (3) to identify the baryon fraction and efficiency of disk collapse
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2001-12-02T17:44:18Z/2001-12-02T21:53:42Z
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 Benjamin Weiner, 2003, 'The X-ray halos of extremely luminous giant LSB and HSB disk galaxies', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-l3ph30t
