|Title||Sculptor and Sextans dwarf spheriodal galaxies|
|Author||Dr Sara Saeedi|
|Description||Recent studies of the Draco dwarf spheroidal galaxy(dSph) using XMM-Newton observations show that the X-ray source population is dominated by accreting white dwarfs(AWDs).(Saeedi et al, submitted AA, 2018; AA 2016; MNRAS, 2018). Among the dSphs, which are satellites of the Milky Way, there are only two dSphs, which have similar distances to the distance of the Draco dSph, but noticeable higher stellar masses. Sculptor dSph (M =2.3 106 M ) and the Sextans dSph (M =0.44 106 M ) with the distances of 90 kpc, have been never observed by XMM-Newton. We propose to observe these two dSphs for the first time, mainly in order 1) to perform the multi-wavelength study of X-ray sources aiming classification and study of AWDs. 2) to compare the population of AWDs of different dSphs.|
|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, 2020-12-31T23:00:00Z, 084443, 18.00_20191217_1110. https://doi.org/10.5270/esa-[xxxxxxx]|