|Title||WHITE DWARF MASSES FOR CATACLYSMIC VARIABLES WITH VERY HARD ENERGY SPECTRA|
|Author||Dr John Tomsick|
|Description||The hard X-rays from accreting white dwarfs (WDs) in magnetic cataclysmic variables (CVs) are produced by shock-heating in the accretion column, and the measured temperature depends on the mass of the WD. By obtaining high-quality hard X-ray spectra, it is possible to measure the temperature and constrain the WD mass. An important question is whether the WD mass distribution extends up to the Chandrasekhar limit. The best place to look for high-mass WDs is among CVs with the hardest spectra, making CVs found in the 20-100 keV INTEGRAL survey good candidates for having more massive WDs. We propose NuSTAR and XMM observations of two IGR CVs.|
|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, 2021-11-05T00:00:00Z, 087079, 18.02_20200221_1200. https://doi.org/10.57780/esa-4q9hle3|