The dwarf spheroidal (dSph) galaxies in the Local Group are of considerableinterest because of their unusually high mass-to-luminosity (M/L) ratios. The^ated M/L ratios have led to claims of the presence of extraordinary amountsof Dark Matter (DM) in the dSph galaxies. We propose a 70ks X-ray observation ofDraco in order to search for quiescent low-mass x-ray binaries (qLMXBs). Thesedata offer the potential for an independent estimate of the amount of DM inDraco and provide an opportunity to test alternative models that employ initialmass function (IMF) variations and internal dynamics of stellar populations toexplain the observed M/L ratios.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2009-08-04T03:40:16Z/2009-08-28T07:27:58Z
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, Prof Kalvir Dhuga, 2010, 'Probing Dark Matter in Draco with X-Ray Binaries', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-jio1d2l
