<i>TESS</i> spots a mini- interior to a hot saturn in the TOI-2000 system

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dc.contributor.authorSha, Lizhou
dc.contributor.authorVanderburg, Andrew M.
dc.contributor.authorHuang, Chelsea X.
dc.contributor.authorArmstrong, David J.
dc.contributor.authorBrahm, Rafael
dc.contributor.authorGiacalone, Steven
dc.contributor.authorWood, Mackenna L.
dc.contributor.authorCollins, Karen A.
dc.contributor.authorNielsen, Louise D.
dc.contributor.authorHobson, Melissa J.
dc.contributor.authorZiegler, Carl
dc.contributor.authorHowell, Steve B.
dc.contributor.authorTorres-Miranda, Pascal
dc.contributor.authorMann, Andrew W.
dc.contributor.authorZhou, George
dc.contributor.authorDelgado-Mena, Elisa
dc.contributor.authorRojas, Felipe, I
dc.contributor.authorAbe, Lyu
dc.contributor.authorTrifonov, Trifon
dc.contributor.authorAdibekyan, Vardan
dc.contributor.authorSousa, Sergio G.
dc.contributor.authorFajardo-Acosta, Sergio B.
dc.contributor.authorGuillot, Tristan
dc.contributor.authorHoward, Saburo
dc.contributor.authorLittlefield, Colin
dc.contributor.authorHawthorn, Faith
dc.contributor.authorSchmider, Francois-Xavier
dc.contributor.authorEberhardt, Jan
dc.contributor.authorTan, Thiam-Guan
dc.contributor.authorOsborn, Ares
dc.contributor.authorSchwarz, Richard P.
dc.contributor.authorStrom, Paul
dc.contributor.authorJordan, Andres
dc.contributor.authorWang, Gavin
dc.contributor.authorHenning, Thomas
dc.contributor.authorMassey, Bob
dc.contributor.authorLaw, Nicholas
dc.contributor.authorStockdale, Chris
dc.contributor.authorFurlan, Elise
dc.contributor.authorSrdoc, Gregor
dc.contributor.authorWheatley, Peter J.
dc.contributor.authorNavascues, David Barrado
dc.contributor.authorLissauer, Jack J.
dc.contributor.authorStassun, Keivan G.
dc.contributor.authorRicker, George R.
dc.contributor.authorVanderspek, Roland K.
dc.contributor.authorLatham, David W.
dc.contributor.authorWinn, Joshua N.
dc.contributor.authorSeager, Sara
dc.contributor.authorJenkins, Jon M.
dc.contributor.authorBarclay, Thomas
dc.contributor.authorBouma, Luke G.
dc.contributor.authorChristiansen, Jessie L.
dc.contributor.authorGuerrero, Natalia
dc.contributor.authorRose, Mark E.
dc.date.accessioned2025-01-20T20:07:42Z
dc.date.available2025-01-20T20:07:42Z
dc.date.issued2023
dc.description.abstractHot jupiters (P < 10 d, M > 60 M.) are almost always found alone around their stars, but four out of hundreds known have inner companion planets. These rare companions allow us to constrain the hot jupiter's formation history by ruling out high-eccentricity tidal migration. Less is known about inner companions to hot Saturn-mass planets. We report here the discovery of the TOI-2000 system, which features a hot Saturn-mass planet with a smaller inner companion. The mini-neptune TOI-2000 b (2.70 +/- 0.15 R-circle plus, 11.0 +/- 2.4 M.) is in a 3.10-d orbit, and the hot saturn TOI-2000 c (8.14(+0.31) (-0.30) R-circle plus, 81.7(-4.6)(+4.7) M.) is in a 9.13-d orbit. Both planets transit their host star TOI-2000 (TIC 371188886, V = 10.98, TESS magnitude = 10.36), a metal-rich ([Fe/H] = 0.439 (+0.041)(-0.043)) G dwarf 173 pc away. TESS observed the two planets in sectors 9-11 and 36-38, and we followed up with groundbased photometry, spectroscopy, and speckle imaging. Radial velocities from CHIRON, FEROS, and HARPS allowed us to confirm both planets by direct mass measurement. In addition, we demonstrate constraining planetary and stellar parameters with MIST stellar evolutionary tracks through Hamiltonian Monte Carlo under the PYMC framework, achieving higher sampling efficiency and shorter run time compared to traditional Markov chain Monte Carlo. Having the brightest host star in the V band among similar systems, TOI-2000 b and c are superb candidates for atmospheric characterization by the JWST, which can potentially distinguish whether they formed together or TOI-2000 c swept along material during migration to form TOI-2000 b.
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/stad1666
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/stad1666
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/91835
dc.identifier.wosidWOS:001038648500002
dc.issue.numero1
dc.language.isoen
dc.pagina.final1138
dc.pagina.inicio1113
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjecttechniques: photometric
dc.subjecttechniques: radial velocities
dc.subjectplanets and satellites: detection
dc.subjectplanets and satellites: formation
dc.subjectplanets and satellites: gaseous planets
dc.subjectstars: individual: TOI-2000 (TIC 371188886)
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.title<i>TESS</i> spots a mini- interior to a hot saturn in the TOI-2000 system
dc.typeartículo
dc.volumen524
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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