|Title||Spin periods and accretion disc structure in CV.s below the period gap|
|Author||Dr Pasi Hakala|
|Description||Our XMM-Newton observations of dwarf nova OY Car have revealed a possible WD spin period at 0.41 of the orbital period (Ramsay et al. 2001a). Now we plan to observe a set of other dwarf novae below the period gap in order to search for WD spin periods. If they are detectable in X-rays, it immediatedly implies that the white dwarfs in these systems are at least weakly magnetic. This would extend the spectrum of magnetic CV.s into even weaker field systems than the intermediate polars. We will also use our accretion disc structure modelling codes, together with combined X-ray and OM light curves, to retrieve information on the 3D structure of the discs in these systems.|
|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, 2003-11-14T00:00:00Z, 015253, 17.56_20190403_1200. https://doi.org/10.5270/esa-d38oh8y|