|Title||Hybrid Stars and Coronal Evolution|
|Author||Dr Andrea Dupree|
|Description||To construct a comprehensive picture of coronal evolution we propose to obtain XMM spectra of a hybrid star (HD 150798) and a pre-hybrid star (HD 159181). These objects are in the ..warm. corona-..warm. wind state of evolution and form the critical connecting link between coronal stars (with hot coronae and low mass loss rates) and the Alpha-Ori type objects (with cool coronae and massive winds). XMM spectra will yield emission measures from line-based analyses, electron densities, the size of the corona, and evidence (or not) for a coronal enhancement of abundances (FIP effect).|
|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, 2003-12-04T00:00:00Z, 002175, 17.56_20190403_1200. https://doi.org/10.5270/esa-apviqq1|