|Title||Dragonfly 44 and the Nature of Ultra-Diffuse Galaxies|
|Author||Mr Edmund Hodges-Kluck|
|Description||Dragonfly 44 is an ultra-diffuse galaxy with a stellar mass of only 3e8 Msun but a dynamical mass of 1e12 Msun and about 100 globular clusters. This suggests that it is a central galaxy that somehow lost its gas, rather than a stripped satellite. We propose measuring the amount of hot gas, which is the primary source of fuel for star formation in galaxies of this size, as well as its present-day star formation rate and number of low-mass X-ray binaries. These will provide important clues to the nature of Dragonfly 44 and the thousands of other known ultra-diffuse galaxies.|
|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, 2019-01-30T23:00:00Z, 080058, 17.56_20190403_1200. https://doi.org/10.5270/esa-yz5tufm|