A dataset provided by the European Space Agency

Name 088425
Title The mysterious survival of volatiles on the first ultra-hot Neptune


DOI https://doi.org/10.57780/esa-mrf0g67
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
Temporal Coverage 2021-05-27T18:30:27Z/2021-05-28T09:15:27Z
Version 19.16_20210326_1200
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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2022-07-10T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2022-07-10T00:00:00Z, 088425, 19.16_20210326_1200. https://doi.org/10.57780/esa-mrf0g67