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A hot mini-Neptune and a temperate, highly eccentric sub-Saturn around the bright K-dwarf TOI-2134
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dc.contributor.author | Rescigno, F | |
dc.contributor.author | Hébrard, G | |
dc.contributor.author | Vanderburg, A | |
dc.contributor.author | Mann, A W | |
dc.contributor.author | Mortier, A | |
dc.contributor.author | Morrell, S | |
dc.contributor.author | Buchhave, L A | |
dc.contributor.author | Collins, K A | |
dc.contributor.author | Mann, C R | |
dc.contributor.author | Hellier, C | |
dc.contributor.author | Haywood, R D | |
dc.contributor.author | West, R | |
dc.contributor.author | Stalport, M | |
dc.contributor.author | Heidari, N | |
dc.contributor.author | Anderson, D | |
dc.contributor.author | Huang, C X | |
dc.contributor.author | López-Morales, M | |
dc.contributor.author | Cortés-Zuleta, P | |
dc.contributor.author | Lewis, H M | |
dc.contributor.author | Dumusque, X | |
dc.contributor.author | Boisse, I | |
dc.contributor.author | Rowden, P | |
dc.contributor.author | Cameron, A Collier | |
dc.contributor.author | Deleuil, M | |
dc.contributor.author | Vezie, M | |
dc.contributor.author | Pepe, F A | |
dc.contributor.author | Delfosse, X | |
dc.contributor.author | Charbonneau, D | |
dc.contributor.author | Rice, K | |
dc.contributor.author | Demangeon, O | |
dc.contributor.author | Quinn, S N | |
dc.contributor.author | Udry, S | |
dc.contributor.author | Forveille, T | |
dc.contributor.author | Winn, J N | |
dc.contributor.author | Sozzetti, A | |
dc.contributor.author | Hoyer, S | |
dc.contributor.author | Seager, S | |
dc.contributor.author | Wilson, T G | |
dc.contributor.author | Dalal, S | |
dc.contributor.author | Martioli, E | |
dc.contributor.author | Striegel, S | |
dc.contributor.author | Boschin, W | |
dc.contributor.author | Dragomir, D | |
dc.contributor.author | Fiorenzano, A F Martínez | |
dc.contributor.author | Cosentino, R | |
dc.contributor.author | Ghedina, A | |
dc.contributor.author | Malavolta, L | |
dc.contributor.author | Affer, L | |
dc.contributor.author | Lakeland, B S | |
dc.contributor.author | Nicholson, B A | |
dc.contributor.author | Foschino, S | |
dc.contributor.author | Wünsche, A | |
dc.contributor.author | Barkaoui, K | |
dc.contributor.author | Srdoc, G | |
dc.contributor.author | Randolph, J | |
dc.contributor.author | Guillet, B | |
dc.contributor.author | Conti, D M | |
dc.contributor.author | Ghachoui, M | |
dc.contributor.author | Gillon, M | |
dc.contributor.author | Benkhaldoun, Z | |
dc.contributor.author | Pozuelos, F J | |
dc.contributor.author | Timmermans, M | |
dc.contributor.author | Girardin, E | |
dc.contributor.author | Matutano, S | |
dc.contributor.author | Bosch-Cabot, P | |
dc.contributor.author | Muñoz, J A | |
dc.contributor.author | Forés-Toribio, R | |
dc.date.accessioned | 2023-12-13T11:30:01Z | |
dc.date.available | 2023-12-13T11:30:01Z | |
dc.date.issued | 2024-11 | |
dc.identifier | 297371773 | |
dc.identifier | 4647ed3a-9d17-42d6-ba86-fc18e9ec8d8b | |
dc.identifier | 85179837033 | |
dc.identifier.citation | Rescigno , F , Hébrard , G , Vanderburg , A , Mann , A W , Mortier , A , Morrell , S , Buchhave , L A , Collins , K A , Mann , C R , Hellier , C , Haywood , R D , West , R , Stalport , M , Heidari , N , Anderson , D , Huang , C X , López-Morales , M , Cortés-Zuleta , P , Lewis , H M , Dumusque , X , Boisse , I , Rowden , P , Cameron , A C , Deleuil , M , Vezie , M , Pepe , F A , Delfosse , X , Charbonneau , D , Rice , K , Demangeon , O , Quinn , S N , Udry , S , Forveille , T , Winn , J N , Sozzetti , A , Hoyer , S , Seager , S , Wilson , T G , Dalal , S , Martioli , E , Striegel , S , Boschin , W , Dragomir , D , Fiorenzano , A F M , Cosentino , R , Ghedina , A , Malavolta , L , Affer , L , Lakeland , B S , Nicholson , B A , Foschino , S , Wünsche , A , Barkaoui , K , Srdoc , G , Randolph , J , Guillet , B , Conti , D M , Ghachoui , M , Gillon , M , Benkhaldoun , Z , Pozuelos , F J , Timmermans , M , Girardin , E , Matutano , S , Bosch-Cabot , P , Muñoz , J A & Forés-Toribio , R 2024 , ' A hot mini-Neptune and a temperate, highly eccentric sub-Saturn around the bright K-dwarf TOI-2134 ' , Monthly Notices of the Royal Astronomical Society , vol. 527 , no. 3 , pp. 5385–5407 . https://doi.org/10.1093/mnras/stad3255 | en |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | Jisc: 1444456 | |
dc.identifier.other | ORCID: /0000-0002-6174-4666/work/148887752 | |
dc.identifier.other | ORCID: /0000-0002-8863-7828/work/148888253 | |
dc.identifier.uri | https://hdl.handle.net/10023/28862 | |
dc.description | Funding: ACC and TGW acknowledge support from STFC consolidated grant numbers ST/R000824/1 and ST/V000861/1, and UKSA grant number ST/R003203/1. RDH is funded by the UK Science and Technology Facilities Council (STFC)’s Ernest Rutherford Fellowship (grant no. ST/V004735/1). SD is funded by the UK Science and Technology Facilities Council (grant no. ST/V004735/1). BSL is funded by a UK Science and Technology Facilities Council (STFC) studentship (ST/V506679/1). This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement SCORE no. 851555). | en |
dc.description.abstract | We present the characterisation of an inner mini-Neptune in a 9.2292005±0.0000063 day orbit and an outer mono-transiting sub-Saturn planet in a 95.50+0.36-0.25 day orbit around the moderately active, bright (mv = 8.9 mag) K5V star TOI-2134. Based on our analysis of five sectors of TESS data, we determine the radii of TOI-2134b and c to be 2.69±0.16 R⊕ for the inner planet and 7.27±0.42 R⊕ for the outer one. We acquired 111 radial-velocity spectra with HARPS-N and 108 radial-velocity spectra with SOPHIE. After careful periodogram analysis, we derive masses for both planets via Gaussian Process regression: 9.13+0.78-0.76 M⊕ for TOI-2134b and 41.89+7.69-7.83 M⊕ for TOI-2134c. We analysed the photometric and radial-velocity data first separately, then jointly. The inner planet is a mini-Neptune with density consistent with either a water-world or a rocky core planet with a low-mass H/He envelope. The outer planet has a bulk density similar to Saturn’s. The outer planet is derived to have a significant eccentricity of 0.67+0.05-0.06 from a combination of photometry and RVs. We compute the irradiation of TOI-2134c as 1.45±0.10 times the bolometric flux received by Earth, positioning it for part of its orbit in the habitable zone of its system. We recommend further RV observations to fully constrain the orbit of TOI-2134c. With an expected Rossiter-McLaughlin (RM) effect amplitude of 7.2±1.3 m-1, we recommend TOI-2134c for follow-up RM analysis to study the spin-orbit architecture of the system. We calculate the Transmission Spectroscopy Metric, and both planets are suitable for bright-mode NIRCam atmospheric characterisation. | |
dc.format.extent | 3706875 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | en |
dc.subject | Methods: data analysis | en |
dc.subject | Techniques: photometric | en |
dc.subject | Techniques: radial velocities | en |
dc.subject | Planets and satellites: detection | en |
dc.subject | ctivity – stars: individual (TOI-2134, TIC 75878355, G 204-45) | en |
dc.subject | QB Astronomy | en |
dc.subject | QC Physics | en |
dc.subject | 3rd-DAS | en |
dc.subject.lcc | QB | en |
dc.subject.lcc | QC | en |
dc.title | A hot mini-Neptune and a temperate, highly eccentric sub-Saturn around the bright K-dwarf TOI-2134 | en |
dc.type | Journal article | en |
dc.contributor.sponsor | Science & Technology Facilities Council | en |
dc.contributor.sponsor | Science & Technology Facilities Council | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.contributor.institution | University of St Andrews. St Andrews Centre for Exoplanet Science | en |
dc.identifier.doi | https://doi.org/10.1093/mnras/stad3255 | |
dc.description.status | Peer reviewed | en |
dc.identifier.grantnumber | ST/R00824/1 | en |
dc.identifier.grantnumber | ST/R003203/1 | en |
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