We propose to observe the only star known to have an orbiting planet which makesa transit as seen from the earth: HD209458, with a triple objective:1. the first detection of an atmosphere around an exo-planet, by comparing thelight curve in the UV with the one obtained in the visible by the HST, as theRayleigh extinction is expected to happen at different levels in the atmosphereas a function of wavelength.2. characterize the x-ray emission of the star to determine better its age3. try to detect the possible x-ray emission due to charge exchange of stellarwind ions with the atmosphere of the planet, a phenomenon well observed oncomets in our solar system.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2003-06-11T08:41:44Z/2003-06-11T15:03:00Z
Version
17.56_20190403_1200
Mission Description
The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs 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 Earths 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.
European Space Agency, Dr Bertaux Jean-loup, 2004, 'Detection of the atmosphere of the planet around HD209458 with XMM-Newton', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-85uhk97
