|Title||A survey in hard X-rays for probing accretion and ejection in Symbiotic Stars|
|Author||Dr Matthias Stute|
|Description||Symbiotic stars are interacting binaries, containing white dwarfs accreting at high rates from a wind of the red giant companion. These systems are possible progenitors for type Ia supernovae. The most crucial parameter in symbiotic systems is the accretion rate, since i) it determines (together with the mass) the lifetime of the white dwarf until a possible supernova explosion and ii) possibly explains the striking dichotomy concerning the fraction of objects with and without jets in symbiotics and CVs. In this project, we will search for hard X-ray emission from symbiotic stars which is the most valuable probe for the accretion process. We will determine the fraction of sources which produce hard X-rays, the mass distribution of white dwarfs, the distribution of accretion rates and their lifetimes.|
|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, 2011-03-30T00:00:00Z, 060492, 17.56_20190403_1200. https://doi.org/10.5270/esa-6q1zhgr|