An ultrahot Neptune in the Neptune desert

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dc.contributor.authorJenkins, James S.
dc.contributor.authorDiaz, Matias R.
dc.contributor.authorKurtovic, Nicolas T.
dc.contributor.authorEspinoza, Nestor
dc.contributor.authorVines, Jose I.
dc.contributor.authorRojas, Pablo A. Pena
dc.contributor.authorBrahm, Rafael
dc.contributor.authorTorres, Pascal
dc.contributor.authorCortes-Zuleta, Pia
dc.contributor.authorSoto, Maritza G.
dc.contributor.authorLopez, Eric D.
dc.contributor.authorKing, George W.
dc.contributor.authorWheatley, Peter J.
dc.contributor.authorWinn, Joshua N.
dc.contributor.authorCiardi, David R.
dc.contributor.authorRicker, George
dc.contributor.authorVanderspek, Roland
dc.contributor.authorLatham, David W.
dc.contributor.authorSeager, Sara
dc.contributor.authorJenkins, Jon M.
dc.contributor.authorBeichman, Charles A.
dc.contributor.authorBieryla, Allyson
dc.contributor.authorBurke, Christopher J.
dc.contributor.authorChristiansen, Jessie L.
dc.contributor.authorHenze, Christopher E.
dc.contributor.authorKlaus, Todd C.
dc.contributor.authorMcCauliff, Sean
dc.contributor.authorMori, Mayuko
dc.contributor.authorNarita, Norio
dc.contributor.authorNishiumi, Taku
dc.contributor.authorTamura, Motohide
dc.contributor.authorde Leon, Jerome Pitogo
dc.contributor.authorQuinn, Samuel N.
dc.contributor.authorVillasenor, Jesus Noel
dc.contributor.authorVezie, Michael
dc.contributor.authorLissauer, Jack J.
dc.contributor.authorCollins, Karen A.
dc.contributor.authorCollins, Kevin I.
dc.contributor.authorIsopi, Giovanni
dc.contributor.authorMallia, Franco
dc.contributor.authorErcolino, Andrea
dc.contributor.authorPetrovich, Cristobal
dc.contributor.authorJordan, Andres
dc.contributor.authorActon, Jack S.
dc.contributor.authorArmstrong, David J.
dc.contributor.authorBayliss, Daniel
dc.contributor.authorBouchy, Francois
dc.contributor.authorBelardi, Claudia
dc.contributor.authorBryant, Edward M.
dc.contributor.authorBurleigh, Matthew R.
dc.contributor.authorCabrera, Juan
dc.contributor.authorCasewell, Sarah L.
dc.contributor.authorChaushev, Alexander
dc.contributor.authorCooke, Benjamin F.
dc.contributor.authorEigmueller, Philipp
dc.contributor.authorErikson, Anders
dc.contributor.authorFoxell, Emma
dc.contributor.authorGansicke, Boris T.
dc.contributor.authorGill, Samuel
dc.contributor.authorGillen, Edward
dc.contributor.authorGuenther, Maximilian N.
dc.contributor.authorGoad, Michael R.
dc.contributor.authorHooton, Matthew J.
dc.contributor.authorJackman, James A. G.
dc.contributor.authorLouden, Tom
dc.contributor.authorMcCormac, James
dc.contributor.authorMoyano, Maximiliano
dc.contributor.authorNielsen, Louise D.
dc.contributor.authorPollacco, Don
dc.contributor.authorQueloz, Didier
dc.contributor.authorRauer, Heike
dc.contributor.authorRaynard, Liam
dc.contributor.authorSmith, Alexis M. S.
dc.contributor.authorTilbrook, Rosanna H.
dc.contributor.authorTitz-Weider, Ruth
dc.contributor.authorTurner, Oliver
dc.contributor.authorUdry, Stephane
dc.contributor.authorWalker, Simon. R.
dc.contributor.authorWatson, Christopher A.
dc.contributor.authorWest, Richard G.
dc.contributor.authorPalle, Enric
dc.contributor.authorZiegler, Carl
dc.contributor.authorLaw, Nicholas
dc.contributor.authorMann, Andrew W.
dc.date.accessioned2025-01-23T19:48:37Z
dc.date.available2025-01-23T19:48:37Z
dc.date.issued2020
dc.description.abstractAbout 1 out of 200 Sun-like stars has a planet with an orbital period shorter than one day: an ultrashort-period planet(1,2). All of the previously known ultrashort-period planets are either hot Jupiters, with sizes above 10 Earth radii (R-circle plus), or apparently rocky planets smaller than 2 R-circle plus. Such lack of planets of intermediate size (the `hot Neptune desert') has been interpreted as the inability of low-mass planets to retain any hydrogen/ helium (H/He) envelope in the face of strong stellar irradiation. Here we report the discovery of an ultrashort-period planet with a radius of 4.6 R-circle plus and a mass of 29 M-circle plus, firmly in the hot Neptune desert. Data from the Transiting Exoplanet Survey Satellite(3) revealed transits of the bright Sun-like star LTT 9779 every 0.79 days. The planet's mean density is similar to that of Neptune, and according to thermal evolution models, it has a H/He-rich envelope constituting 9.0(-2.9)(+2.7) % of the total mass. With an equilibrium temperature around 2,000 K, it is unclear how this `ultrahot Neptune' managed to retain such an envelope. Follow-up observations of the planet's atmosphere to better understand its origin and physical nature will be facilitated by the star's brightness (V-mag = 9.8).
dc.fuente.origenWOS
dc.identifier.doi10.1038/s41550-020-1142-z
dc.identifier.issn2397-3366
dc.identifier.urihttps://doi.org/10.1038/s41550-020-1142-z
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/100453
dc.identifier.wosidWOS:000571722300001
dc.issue.numero12
dc.language.isoen
dc.revistaNature astronomy
dc.rightsacceso restringido
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titleAn ultrahot Neptune in the Neptune desert
dc.typeartículo
dc.volumen4
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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