|Title||A SURVEY OF HELIUM ACCRETING WHITE DWARFS|
|Author||Dr GAVIN RAMSAY|
|Description||We propose to carry out a survey of AM CVn systems -- close binaries in which a white dwarf is accreting material from a white dwarf. This will be the most sensitive X-ray survey of such objects. We will measure their luminosities and determine if they correlate with orbital period and X-ray colour. The source of X-ray emission in these systems is not known. These observations will allow us to make significant progress in answering this question. We will also search for emission lines in the X-ray spectra - this will allow us to constrain the chemical composition of these systems. These observations will provide the first simultaneous X-ray and UV data with high time resolution: this is important in relating the UV and X-ray emission mechanisms.|
|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, 2005-02-20T00:00:00Z, 020289, 17.56_20190403_1200. https://doi.org/10.5270/esa-lsly8yg|