|Title||Further observations of large core globular clusters with XMM_Newton|
|Author||Dr Didier Barret|
|Description||Globular Clusters (GCs) are known to contain two classes of X-ray sources: the bright sources which are neutron star Low-mass X-ray Binaries (LMXBs); and the dim sources whose nature is still discussed. It has been proposed that they could be: cataclysmic variables; X-ray transients in quiescence; or millisecond pulsars, where indeed all these objects have recently been found in the central region of the GC 47 Tuc. We propose to continue our investigations of GCs with large cores, to include five more GCs, and use the XMM-Newton spectral capabilities to determine the nature of their dim X-ray sources. Characterizing the content of GCs is of considerable interest for theories of binary production and evolution, as well as dynamical evolution and survival of GCs.|
|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, 2004-09-07T00:00:00Z, 014845, 17.56_20190403_1200. https://doi.org/10.5270/esa-lepbbc2|