|Title||The mysterious survival of volatiles on the first ultra-hot Neptune|
|Author||Prof Peter Wheatley|
|Description||Our team has discovered the first ultra-hot Neptune: LTT 9779b. This exoplanet is located just 0.017 au from its G7V host star, in the middle of the so-called Neptunian desert, and its survival under presumably intense X-ray irradiation is a mystery. All previous evidence points to close-in Neptunes being stripped of their gaseous envelopes and being reduced to hot rocky cores. We propose to observe the host star with XMM-Newton in order to determine the present X-ray irradiation. If the star is found to have normal coronal activity, we will be forced to consider novel evolutionary scenarios for this system.|
|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, 2022-07-10T00:00:00Z, 088425, 19.16_20210326_1200. https://doi.org/10.5270/esa-[xxxxxxx]|