|Title||The structure of the accretion region in AM Her type binaries|
|Author||Mr Dirk Pandel|
|Description||Much has been learned about the accretion processes in AM Her type binaries from polarimetric and spectroscopic studies. Yet the structure of the accretion region, i.e. its shape, temperature distribution and density profile, is observationally still not well known. The X-ray emission observable with XMM-Newton is an excellent tool to study the properties of this region. We propose to observe four AM Her type binaries in which the accretion region is occulted by the white dwarf for some part of the orbital cycle. From the shape of the X-ray light curves we will be able to derive the temperature and density distribution in the post-shock region, the spatial variations of the accretion rate, the height of the shock and the optical depth of the post-shock region.|
|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, 2004-11-07T00:00:00Z, 015019, 17.56_20190403_1200. https://doi.org/10.5270/esa-uoxl49z|