|Title||Dependence of Coronal Element Fractionation on Metallcity|
|Author||Prof Ehud Behar|
|Description||We propose to study elemental fractionation between the photosphere and the corona in stars with super-solar abundances, and their dependence on the First Ionization Potential (FIP). Currently, coronal abundances have been measured for only 3 stars with average metallicity of [A Z -A H ] > 0.3. We propose to observe 5 additional metal rich stars in order to understand whether high atmospheric abundances affect coronal composition. The immediate goal of the proposed observations is to determine the coronal enrichment and depletion factor(s) for confirmed high-metallicity stars, compare them with those previously found for stars with solar abundances and measure (or exclude) the dependence of the process(es) causing coronal fractionation on metallicity.|
|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, 2018-04-12T22:00:00Z, 078051, 17.56_20190403_1200. https://doi.org/10.5270/esa-c99zjdk|