A dataset provided by the European Space Agency

Name: The mysterious survival of volatiles on the first ultra-hot Neptune
Published: 2022-07-10T00:00:00Z

Proposal ID	088425
Title	The mysterious survival of volatiles on the first ultra-hot Neptune
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0884250101
DOI	https://doi.org/10.57780/esa-mrf0g67
Principal Investigator, PI	Prof Peter Wheatley
Abstract	Our team has discovered the first ultra-hot Neptune\: LTT 9779b. This exoplanetis located just 0.017 au from its G7V host star, in the middle of the so-calledNeptunian desert, and its survival under presumably intense X-ray irradiation isa mystery. All previous evidence points to close-in Neptunes being stripped oftheir gaseous envelopes and being reduced to hot rocky cores. We propose toobserve the host star with XMM-Newton in order to determine the present X-rayirradiation. If the star is found to have normal coronal activity, we will beforced to consider novel evolutionary scenarios for this system.
Publications	Survival in the Neptune desert: LTT 9779 b kept its atmosphere thanks to an unusually X-ray faint host star \|Fern\\u00e1ndez Fern\\u00e1ndez, Jorge, Wheatley, Peter J., et al. \| MNRAS \| 527-911 \| 2024 \| 2024MNRAS.527..911F \| http://ui.adsabs.harvard.edu/#abs/2024MNRAS.527..911F The XMM-Newton Line Emission Analysis Program (X-LEAP). I. Emission-line Survey of O VII, O VIII, and Fe L-shell Transitions \|Pan, Zeyang, Qu, Zhijie, et al. \| ApJS \| 271-62 \| 2024 \| 2024ApJS..271...62P \| http://ui.adsabs.harvard.edu/#abs/2024ApJS..271...62P From Active Stars to Black Holes: A Discovery Tool for Galactic X-Ray Sources \|Rodriguez, Antonio C., \| PASP \| 136-054201 \| 2024 \| 2024PASP..136e4201R \| http://ui.adsabs.harvard.edu/#abs/2024PASP..136e4201R
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 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.
Creator Contact	https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published	2022-07-10T00:00:00Z
Keywords	"gaseous envelopes", "XMM", "called neptunian desert", "novel evolutionary scenarios", "intense xray irradiation", "017 au", "hot rocky cores", "normal coronal activity", "XMM-Newton", "xray irradiation", "ultra hot neptune", "xmm newton"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Prof Peter Wheatley, 2022, 'The mysterious survival of volatiles on the first ultra-hot Neptune', 19.16_20210326_1200, European Space Agency, https://doi.org/10.57780/esa-mrf0g67