TOI-257b (HD 19916b): a warm sub-saturn orbiting an evolved F-type star

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dc.contributor.authorAddison, Brett C.
dc.contributor.authorWright, Duncan J.
dc.contributor.authorNicholson, Belinda A.
dc.contributor.authorCale, Bryson
dc.contributor.authorMocnik, Teo
dc.contributor.authorHuber, Daniel
dc.contributor.authorPlavchan, Peter
dc.contributor.authorWittenmyer, Robert A.
dc.contributor.authorVanderburg, Andrew
dc.contributor.authorChaplin, William J.
dc.contributor.authorChontos, Ashley
dc.contributor.authorClark, Jake T.
dc.contributor.authorEastman, Jason D.
dc.contributor.authorZiegler, Carl
dc.contributor.authorBrahm, Rafael
dc.contributor.authorCarter, Bradley D.
dc.contributor.authorClerte, Mathieu
dc.contributor.authorEspinoza, Nestor
dc.contributor.authorHorner, Jonathan
dc.contributor.authorBentley, John
dc.contributor.authorJordan, Andres
dc.contributor.authorKane, Stephen R.
dc.contributor.authorKielkopf, John F.
dc.contributor.authorLaychock, Emilie
dc.contributor.authorMengel, Matthew W.
dc.contributor.authorOkumura, Jack
dc.contributor.authorStassun, Keivan G.
dc.contributor.authorBedding, Timothy R.
dc.contributor.authorBowler, Brendan P.
dc.contributor.authorBurnelis, Andrius
dc.contributor.authorBlanco-Cuaresma, Sergi
dc.contributor.authorCollins, Michaela
dc.contributor.authorCrossfield, Ian
dc.contributor.authorDavis, Allen B.
dc.contributor.authorEvensberget, Dag
dc.contributor.authorHeitzmann, Alexis
dc.contributor.authorHowell, Steve B.
dc.contributor.authorLaw, Nicholas
dc.contributor.authorMann, Andrew W.
dc.contributor.authorMarsden, Stephen C.
dc.contributor.authorMatson, Rachel A.
dc.contributor.authorO'Connor, James H.
dc.contributor.authorShporer, Avi
dc.contributor.authorStevens, Catherine
dc.contributor.authorTinney, C. G.
dc.contributor.authorTylor, Christopher
dc.contributor.authorWang, Songhu
dc.contributor.authorZhang, Hui
dc.contributor.authorHenning, Thomas
dc.contributor.authorKossakowski, Diana
dc.contributor.authorRicker, George
dc.contributor.authorSarkis, Paula
dc.contributor.authorSchlecker, Martin
dc.contributor.authorTorres, Pascal
dc.contributor.authorVanderspek, Roland
dc.contributor.authorLatham, David W.
dc.contributor.authorSeager, Sara
dc.contributor.authorWinn, Joshua N.
dc.contributor.authorJenkins, Jon M.
dc.contributor.authorMireles, Ismael
dc.contributor.authorRowden, Pam
dc.contributor.authorPepper, Joshua
dc.contributor.authorDaylan, Tansu
dc.contributor.authorSchlieder, Joshua E.
dc.contributor.authorCollins, Karen A.
dc.contributor.authorCollins, Kevin, I
dc.contributor.authorTan, Thiam-Guan
dc.contributor.authorBall, Warrick H.
dc.contributor.authorBasu, Sarbani
dc.contributor.authorBuzasi, Derek L.
dc.contributor.authorCampante, Tiago L.
dc.contributor.authorCorsaro, Enrico
dc.contributor.authorGonzalez-Cuesta, L.
dc.contributor.authorDavies, Guy R.
dc.contributor.authorde Almeida, Leandro
dc.contributor.authordo Nascimento, Jose-Dias, Jr.
dc.contributor.authorGarcia, Rafael A.
dc.contributor.authorGuo, Zhao
dc.contributor.authorHandberg, Rasmus
dc.contributor.authorHekker, Saskia
dc.contributor.authorHey, Daniel R.
dc.contributor.authorKallinger, Thomas
dc.contributor.authorKawaler, Steven D.
dc.contributor.authorKayhan, Cenk
dc.contributor.authorKuszlewicz, James S.
dc.contributor.authorLund, Mikkel N.
dc.contributor.authorLyttle, Alexander
dc.contributor.authorMathur, Savita
dc.contributor.authorMiglio, Andrea
dc.contributor.authorMosser, Benoit
dc.contributor.authorNielsen, Martin B.
dc.contributor.authorSerenelli, Aldo M.
dc.contributor.authorAguirre, Victor Silva
dc.contributor.authorThemessl, Nathalie
dc.date.accessioned2025-01-20T23:54:02Z
dc.date.available2025-01-20T23:54:02Z
dc.date.issued2021
dc.description.abstractWe report the discovery of a warm sub-Saturn, TOI-257b (HD 19916b), based on data from NASA's Transiting Exoplanet Survey Satellite (TESS). The transit signal was detected by TESS and confirmed to be of planetary origin based on radial velocity observations. An analysis of the TESS photometry, the MINERVA-Australis, FEROS, and HARPS radial velocities, and the asteroseismic data of the stellar oscillations reveals that TOI-257b has a mass of M-P = 0.138 +/- 0.023M(J) (43.9 +/- 7.3 M-circle plus), a radius of R-P = 0.639 +/- 0.013 R-J (7.16 +/- 0.15 R-circle plus), bulk density of 0.65(-0.11)(+0.12) (cgs), and period 18.38818(-0.00084)(+0.00085) days. TOI-257b orbits a bright (V = 7.612 mag) somewhat evolved late F-type star with M-* = 1.390 +/- 0.046(Msun), R-* = 1.888 +/- 0.033 R-sun, T-eff = 6075 +/- 90 K, and vsin i = 11.3 +/- 0.5 kms(-1). Additionally, we find hints for a second non-transiting sub-Saturn mass planet on a similar to 71 day orbit using the radial velocity data. This system joins the ranks of a small number of exoplanet host stars (similar to 100) that have been characterized with asteroseismology. Warm sub-Saturns are rare in the known sample of exoplanets, and thus the discovery of TOI-257b is important in the context of future work studying the formation and migration history of similar planetary systems.
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/staa3960
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/staa3960
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95016
dc.identifier.wosidWOS:000648998800038
dc.issue.numero3
dc.language.isoen
dc.pagina.final3722
dc.pagina.inicio3704
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectasteroseismology
dc.subjecttechniques: photometric
dc.subjecttechniques: radial velocities
dc.subjecttechniques: spectroscopic
dc.subjectplanetary systems
dc.subjectstars: individual (TIC 200723869/TOI-257)
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titleTOI-257b (HD 19916b): a warm sub-saturn orbiting an evolved F-type star
dc.typeartículo
dc.volumen502
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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