|Title||Clues for accretion discs and binary evolution from VY Scl stars|
|Author||Dr Matthias R. Schreiber|
|Description||VY Scl stars are in two respects an extraordinary subgroup of Cataclysmic Variables. First, they are located just above the period gap, the most prominent feature of the orbital period distribution of CVs which indicates their exceptional evolutionary status. Secondly, VY Scl stars show long lasting low-states but no dwarf outbursts in their light curves which is still puzzling in the context of the disc instability model (DIM). The aim of this proposal is to detect the one physical characteristic which relates to both, the evolutionary status of VY Scl stars and the mechanism driving their low-states: the magnetic nature of the accreting white dwarf.|
|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, 2006-10-25T00:00:00Z, 030544, 17.56_20190403_1200. https://doi.org/10.5270/esa-ku4pvbm|