|Title||Probing the extended atmosphere of the evaporating exoplanet HD189733b|
|Author||Dr Peter Wheatley|
|Description||HST observations show that two of the brightest transiting exoplanets are evaporating (HD209458b & HD189733b) and models suggest that the evolution of close-in planets may be dominated by this mass loss. X-ray observations during the transits of evaporating planets have the potential to detect absorption by the inner low-velocity regions of the planetary winds that are hidden to HST by interstellar absorption and geocoronal emission. Detections of these dense inner regions are needed in order to determine the dynamics of the planetary outflow and measure the mass loss rates. We propose an intense campaign of XMM-Newton transit observations of the most favourable target, HD189733b, with the aim of detecting the extended atmosphere of the planet and measuring its mass loss rate.|
|Publication||Ground-based detection of an extended helium atmosphere in the Saturn-mass exoplanet WASP-69b . Nortmann, Lisa, Palle, Enric, et all. . Sci . 362-1388 . 2018 . 2018Sci...362.1388N ,
|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, 2016-05-08T22:00:00Z, 074498, 17.56_20190403_1200. https://doi.org/10.5270/esa-dhpokzy|