|Title||The first mass and angular momentum loss measurements for a CV-like binary|
|Author||Dr Jeremy Drake|
|Description||We are proposing for the last of 6 XMM-Newton 15ks observations of the dM+WD pre-cataclysmic variable QS Vir in a coordinated joint HST-XMM campaign. Three year multi-cycle joint HST-XMM observations were approved in 2014, but XMM lacked a multi-cycle program to follow the 2nd and 3rd year HST approval. HST data probe the accretion rate of the M dwarf wind through WD photospheric absorption lines, while XMM measures accretion through accretion shock emission. Earlier non-coordinated observations showed different accretion rates by a factor of 1000. The new observation will probe the accretion variability over the crucial year timescale, provide a measure of the variability of the M dwarf mass and angular momentum loss rates, and make a key test of accretion rates derived from different techniques.|
|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, 2018-08-02T22:00:00Z, 080177, 17.56_20190403_1200. https://doi.org/10.5270/esa-moikdea|