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dc.contributor.authorOsborn, H. P.
dc.contributor.authorBonfanti, A.
dc.contributor.authorGandolfi, D.
dc.contributor.authorHedges, C.
dc.contributor.authorLeleu, A.
dc.contributor.authorFortier, A.
dc.contributor.authorFutyan, D.
dc.contributor.authorGutermann, P.
dc.contributor.authorMaxted, P. F.L.
dc.contributor.authorBorsato, L.
dc.contributor.authorCollins, K. A.
dc.contributor.authorDa Silva, J. Gomes
dc.contributor.authorChew, Y. Gomez Maqueo
dc.contributor.authorHooton, M. J.
dc.contributor.authorLendl, M.
dc.contributor.authorParviainen, H.
dc.contributor.authorSalmon, S.
dc.contributor.authorSchanche, N.
dc.contributor.authorSerrano, L. M.
dc.contributor.authorSousa, S. G.
dc.contributor.authorTuson, A.
dc.contributor.authorUlmer-Moll, S.
dc.contributor.authorVan Grootel, V.
dc.contributor.authorWells, R. D.
dc.contributor.authorWilson, T. G.
dc.contributor.authorAlibert, Y.
dc.contributor.authorAlonso, R.
dc.contributor.authorAnglada, G.
dc.contributor.authorAsquier, J.
dc.contributor.authorBarrado Y Navascues, D.
dc.contributor.authorBaumjohann, W.
dc.contributor.authorBeck, T.
dc.contributor.authorBenz, W.
dc.contributor.authorBiondi, F.
dc.contributor.authorBonfils, X.
dc.contributor.authorBouchy, F.
dc.contributor.authorBrandeker, A.
dc.contributor.authorBroeg, C.
dc.contributor.authorBarczy, T.
dc.contributor.authorBarros, S. C.C.
dc.contributor.authorCabrera, J.
dc.contributor.authorCharnoz, S.
dc.contributor.authorCameron, A. Collier
dc.contributor.authorCsizmadia, S.
dc.contributor.authorDavies, M. B.
dc.contributor.authorDeleuil, M.
dc.contributor.authorDelrez, L.
dc.contributor.authorDemory, B. O.
dc.contributor.authorEhrenreich, D.
dc.contributor.authorErikson, A.
dc.contributor.authorFossati, L.
dc.contributor.authorFridlund, M.
dc.contributor.authorGillon, M.
dc.contributor.authorGomez-Munoz, M. A.
dc.contributor.authorGudel, M.
dc.contributor.authorHeng, K.
dc.contributor.authorHoyer, S.
dc.contributor.authorIsaak, K. G.
dc.contributor.authorKiss, L.
dc.contributor.authorLaskar, J.
dc.contributor.authorDes Etangs, A. Lecavelier
dc.contributor.authorLovis, C.
dc.contributor.authorMagrin, D.
dc.contributor.authorMalavolta, L.
dc.contributor.authorMcCormac, J.
dc.contributor.authorNascimbeni, V.
dc.contributor.authorOlofsson, G.
dc.contributor.authorOttensamer, R.
dc.contributor.authorPagano, I.
dc.contributor.authorPalle, E.
dc.contributor.authorPeter, G.
dc.contributor.authorPiazza, D.
dc.contributor.authorPiotto, G.
dc.contributor.authorPollacco, D.
dc.contributor.authorQueloz, D.
dc.contributor.authorRagazzoni, R.
dc.contributor.authorRando, N.
dc.contributor.authorRauer, H.
dc.contributor.authorReimers, C.
dc.contributor.authorRibas, I.
dc.contributor.authorDemangeon, O. D.S.
dc.contributor.authorSmith, A. M.S.
dc.contributor.authorSabin, L.
dc.contributor.authorSantos, N.
dc.contributor.authorScandariato, G.
dc.contributor.authorSchroffenegger, U.
dc.contributor.authorSchwarz, R. P.
dc.contributor.authorShporer, A.
dc.contributor.authorSimon, A. E.
dc.contributor.authorSteller, M.
dc.contributor.authorSzabo, G. M.
dc.contributor.authorSegransan, D.
dc.contributor.authorThomas, N.
dc.contributor.authorUdry, S.
dc.contributor.authorWalter, I.
dc.contributor.authorWalton, N.
dc.date.accessioned2022-11-30T13:30:04Z
dc.date.available2022-11-30T13:30:04Z
dc.date.issued2022-08-25
dc.identifier282287245
dc.identifieraca2ec66-9a84-4555-9e08-50ec8f2f26f6
dc.identifier85141293670
dc.identifier000844280100005
dc.identifier.citationOsborn , H P , Bonfanti , A , Gandolfi , D , Hedges , C , Leleu , A , Fortier , A , Futyan , D , Gutermann , P , Maxted , P F L , Borsato , L , Collins , K A , Da Silva , J G , Chew , Y G M , Hooton , M J , Lendl , M , Parviainen , H , Salmon , S , Schanche , N , Serrano , L M , Sousa , S G , Tuson , A , Ulmer-Moll , S , Van Grootel , V , Wells , R D , Wilson , T G , Alibert , Y , Alonso , R , Anglada , G , Asquier , J , Barrado Y Navascues , D , Baumjohann , W , Beck , T , Benz , W , Biondi , F , Bonfils , X , Bouchy , F , Brandeker , A , Broeg , C , Barczy , T , Barros , S C C , Cabrera , J , Charnoz , S , Cameron , A C , Csizmadia , S , Davies , M B , Deleuil , M , Delrez , L , Demory , B O , Ehrenreich , D , Erikson , A , Fossati , L , Fridlund , M , Gillon , M , Gomez-Munoz , M A , Gudel , M , Heng , K , Hoyer , S , Isaak , K G , Kiss , L , Laskar , J , Des Etangs , A L , Lovis , C , Magrin , D , Malavolta , L , McCormac , J , Nascimbeni , V , Olofsson , G , Ottensamer , R , Pagano , I , Palle , E , Peter , G , Piazza , D , Piotto , G , Pollacco , D , Queloz , D , Ragazzoni , R , Rando , N , Rauer , H , Reimers , C , Ribas , I , Demangeon , O D S , Smith , A M S , Sabin , L , Santos , N , Scandariato , G , Schroffenegger , U , Schwarz , R P , Shporer , A , Simon , A E , Steller , M , Szabo , G M , Segransan , D , Thomas , N , Udry , S , Walter , I & Walton , N 2022 , ' Uncovering the true periods of the young sub-Neptunes orbiting TOI-2076 ' , Astronomy and Astrophysics , vol. 664 , A156 . https://doi.org/10.1051/0004-6361/202243065en
dc.identifier.issn0004-6361
dc.identifier.otherRIS: urn:171317E25E4A670D96507EE36521BDC9
dc.identifier.otherORCID: /0000-0002-8863-7828/work/123614143
dc.identifier.otherORCID: /0000-0001-8749-1962/work/123614256
dc.identifier.urihttps://hdl.handle.net/10023/26519
dc.descriptionFunding: ACC and TGW acknowledge support from STFC consolidated grant numbers ST/R000824/1 and ST/V000861/1, and UKSA grant ST/R003203/1.en
dc.description.abstractContext. TOI-2076 is a transiting three-planet system of sub-Neptunes orbiting a bright (G = 8.9 mag), young (340 ±80 Myr) K-type star. Although a validated planetary system, the orbits of the two outer planets were unconstrained as only two non-consecutive transits were seen in TESS photometry. This left 11 and 7 possible period aliases for each.  Aims. To reveal the true orbits of these two long-period planets, precise photometry targeted on the highest-probability period aliases is required. Long-term monitoring of transits in multi-planet systems can also help constrain planetary masses through TTV measurements.  Methods. We used the MonoTools package to determine which aliases to follow, and then performed space-based and ground-based photometric follow-up of TOI-2076 c and d with CHEOPS, SAINT-EX, and LCO telescopes.  Results. CHEOPS observations revealed a clear detection for TOI-2076 c at P = 21.01538+0.00084 -0.00074 d, and allowed us to rule out three of the most likely period aliases for TOI-2076 d. Ground-based photometry further enabled us to rule out remaining aliases and confirm the P = 35.12537 ±0.00067 d alias. These observations also improved the radius precision of all three sub-Neptunes to 2.518 ±0.036, 3.497 ±0.043, and 3.232 ±0.063 R⊕. Our observations also revealed a clear anti-correlated TTV signal between planets b and c likely caused by their proximity to the 2:1 resonance, while planets c and d appear close to a 5:3 period commensurability, although model degeneracy meant we were unable to retrieve robust TTV masses. Their inflated radii, likely due to extended H-He atmospheres, combined with low insolation makes all three planets excellent candidates for future comparative transmission spectroscopy with JWST.
dc.format.extent17
dc.format.extent4496137
dc.language.isoeng
dc.relation.ispartofAstronomy and Astrophysicsen
dc.subjectPlanets and satellites: detectionen
dc.subjectStars: individual: TOI-2076en
dc.subjectTechniques: photometricen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subjectSpace and Planetary Scienceen
dc.subjectAstronomy and Astrophysicsen
dc.subject3rd-DASen
dc.subjectMCCen
dc.subject.lccQBen
dc.subject.lccQCen
dc.titleUncovering the true periods of the young sub-Neptunes orbiting TOI-2076en
dc.typeJournal articleen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. St Andrews Centre for Exoplanet Scienceen
dc.identifier.doihttps://doi.org/10.1051/0004-6361/202243065
dc.description.statusPeer revieweden
dc.identifier.urlhttps://arxiv.org/abs/2203.03194en
dc.identifier.grantnumberST/R00824/1en
dc.identifier.grantnumberST/R003203/1en


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