|Title||Calibrating the time-evolution of the high-energy emissions of GKM stars|
|Author||Dr Ignasi Ribas|
|Description||A key element to understand planetary atmospheres (Solar System and exoplanets) is the time-evolution of the flux at short wavelengths (X-ray to UV) of the host stars. While the high-energy flux evolution is well understood for solar-type stars, this is not the case of the later K and M stars. After obtaining some unexpected results on previous AO,10, the proposed XMM-Newton observations will allow us to throw light on the behaviour of X-ray emissions along the critical intermediate-age interval (1-6 Gyr). This will be done by measuring new GKM stars in wide binary pairs with white dwarf companions that we use as chronometers to determine reliable ages. The time-variation of coronal temperature will provide additional diagnostics useful to both exoplanets and dynamo theory.|
|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, 2014-01-15T00:00:00Z, 069346, 17.56_20190403_1200. https://doi.org/10.5270/esa-1l9k9uj|