|Title||X-ray Emission in Wolf-Rayet Stars: XMM Reveals the Shocking Truth|
|Author||Dr Stephen Skinner|
|Description||The ROSAT all-sky survey detected X-ray emission from single Wolf-Rayet (WR) stars and WR binaries. Because of their weaker emission, no spectra of single WR stars presently exist that are of sufficient quality to test theories of their X-ray emission. We propose to utilize the large effective area of XMM to obtain the first high-quality spectrum of a single WR star. Current theories attribute the X-ray emission of single stars to strong shocks that form in their winds as a result of radiative instabilities. If such theories are correct, then the XMM spectra should show only cooler plasma with temperatures below 1 keV. If hotter plasma is detected then radiative shock models will be ruled out.|
|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, 2002-06-01T00:00:00Z, 002494, 17.56_20190403_1200. https://doi.org/10.5270/esa-at6pogz|