K2-280 b - a low density warm sub-Saturn around a mildly evolved star

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dc.contributor.authorNowak, Grzegorz
dc.contributor.authorPalle, Enric
dc.contributor.authorGandolfi, Davide
dc.contributor.authorDeeg, Hans J.
dc.contributor.authorHirano, Teruyuki
dc.contributor.authorBarragan, Oscar
dc.contributor.authorKuzuhara, Masayuki
dc.contributor.authorDai, Fei
dc.contributor.authorLuque, Rafael
dc.contributor.authorPersson, Carina M.
dc.contributor.authorFridlund, Malcolm
dc.contributor.authorJohnson, Marshall C.
dc.contributor.authorKorth, Judith
dc.contributor.authorLivingston, John H.
dc.contributor.authorGrziwa, Sascha
dc.contributor.authorMathur, Savita
dc.contributor.authorHatzes, Artie P.
dc.contributor.authorPrieto-Arranz, Jorge
dc.contributor.authorNespral, David
dc.contributor.authorHidalgo, Diego
dc.contributor.authorHjorth, Maria
dc.contributor.authorAlbrecht, Simon
dc.contributor.authorVan Eylen, Vincent
dc.contributor.authorLam, Kristine W. F.
dc.contributor.authorCochran, William D.
dc.contributor.authorEsposito, Massimiliano
dc.contributor.authorCsizmadia, Szilard
dc.contributor.authorGuenther, Eike W.
dc.contributor.authorKabath, Petr
dc.contributor.authorBlay, Pere
dc.contributor.authorBrahm, Rafael
dc.contributor.authorJordan, Andres
dc.contributor.authorEspinoza, Nestor
dc.contributor.authorRojas, Felipe
dc.contributor.authorCasasayas Barris, Nuria
dc.contributor.authorRodler, Florian
dc.contributor.authorAlonso Sobrino, Roi
dc.contributor.authorCabrera, Juan
dc.contributor.authorCarleo, Ilaria
dc.contributor.authorChaushev, Alexander
dc.contributor.authorde Leon, Jerome
dc.contributor.authorEigmueller, Philipp
dc.contributor.authorEndl, Michael
dc.contributor.authorErikson, Anders
dc.contributor.authorFukui, Akihiko
dc.contributor.authorGeorgieva, Iskra
dc.contributor.authorGonzalez-Cuesta, Lucia
dc.contributor.authorKnudstrup, Emil
dc.contributor.authorLund, Mikkel N.
dc.contributor.authorMontanes Rodriguez, Pilar
dc.contributor.authorMurgas, Felipe
dc.contributor.authorNarita, Norio
dc.contributor.authorNiraula, Prajwal
dc.contributor.authorPaetzold, Martin
dc.contributor.authorRauer, Heike
dc.contributor.authorRedfield, Seth
dc.contributor.authorRibas, Ignasi
dc.contributor.authorSkarka, Marek
dc.contributor.authorSmith, Alexis M. S.
dc.contributor.authorSubjak, Jano
dc.date.accessioned2025-01-23T19:47:15Z
dc.date.available2025-01-23T19:47:15Z
dc.date.issued2020
dc.description.abstractWe present an independent discovery and detailed characterization of K2-280 b, a transiting low density warm sub-Saturn in a 19.9-d moderately eccentric orbit (e = 0.35(-0.04)(+0.05)) from K2 campaign 7. A joint analysis of high precision HARPS, HARPS-N, and FIES radial velocity measurements and K2 photometric data indicates that K2-280 b has a radius of R-b = 7.50 +/- 0.44 R-circle plus and a mass of M-b = 37.1 +/- 5.6 M-circle plus, yielding a mean density of rho(b) = 0.48(-0.10)(+0.13) g cm(-3). The host star is a mildly evolved G7 star with an effective temperature of T-eff = 5500 +/- 100 K, a surface gravity of log g(star) = 4.21 +/- 0.05 (cgs), and an iron abundance of [Fe/H] = 0.33 +/- 0.08 dex, and with an inferred mass of M-star = 1.03 +/- 0.03 M-circle dot and a radius of R-star = 1.28 +/- 0.07 R-circle dot. We discuss the importance of K2-280 b for testing formation scenarios of sub-Saturn planets and the current sample of this intriguing group of planets that are absent in the Solar system.
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/staa2077
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/staa2077
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/100363
dc.identifier.wosidWOS:000587739300034
dc.issue.numero4
dc.language.isoen
dc.pagina.final4435
dc.pagina.inicio4423
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjecttechniques: photometric
dc.subjecttechniques: radial velocities
dc.subjecttechniques: spectroscopic
dc.subjectplanets and satellites: detection
dc.subjectstars: individual: (EPIC 216494238, K2-280)
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titleK2-280 b - a low density warm sub-Saturn around a mildly evolved star
dc.typeartículo
dc.volumen497
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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