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TESS and CHEOPS discover two warm sub-Neptunes transiting the bright K-dwarf HD 15906

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dc.contributor.authorTuson, A
dc.contributor.authorQueloz, D
dc.contributor.authorOsborn, H P
dc.contributor.authorWilson, T G
dc.contributor.authorHooton, M J
dc.contributor.authorBeck, M
dc.contributor.authorLendl, M
dc.contributor.authorOlofsson, G
dc.contributor.authorFortier, A
dc.contributor.authorBonfanti, A
dc.contributor.authorBrandeker, A
dc.contributor.authorBuchhave, L A
dc.contributor.authorCollier Cameron, A
dc.contributor.authorCiardi, D R
dc.contributor.authorCollins, K A
dc.contributor.authorGandolfi, D
dc.contributor.authorGarai, Z
dc.contributor.authorGiacalone, S
dc.contributor.authorGomes da Silva, J
dc.contributor.authorHowell, S B
dc.contributor.authorPatel, J A
dc.contributor.authorPersson, C M
dc.contributor.authorSerrano, L M
dc.contributor.authorSousa, S G
dc.contributor.authorUlmer-Moll, S
dc.contributor.authorVanderburg, A
dc.contributor.authorZiegler, C
dc.contributor.authorAlibert, Y
dc.contributor.authorAlonso, R
dc.contributor.authorAnglada, G
dc.contributor.authorBárczy, T
dc.contributor.authorBarrado Navascues, D
dc.contributor.authorBarros, S C C
dc.contributor.authorBaumjohann, W
dc.contributor.authorBeck, T
dc.contributor.authorBenz, W
dc.contributor.authorBillot, N
dc.contributor.authorBonfils, X
dc.contributor.authorBorsato, L
dc.contributor.authorBroeg, C
dc.contributor.authorCabrera, J
dc.contributor.authorCharnoz, S
dc.contributor.authorConti, D M
dc.contributor.authorCsizmadia, Sz
dc.contributor.authorCubillos, P E
dc.contributor.authorDavies, M B
dc.contributor.authorDeleuil, M
dc.contributor.authorDelrez, L
dc.contributor.authorDemangeon, O D S
dc.contributor.authorDemory, B-O
dc.contributor.authorDragomir, D
dc.contributor.authorDressing, C D
dc.contributor.authorEhrenreich, D
dc.contributor.authorErikson, A
dc.contributor.authorEssack, Z
dc.contributor.authorFarinato, J
dc.contributor.authorFossati, L
dc.contributor.authorFridlund, M
dc.contributor.authorFurlan, E
dc.contributor.authorGill, H
dc.contributor.authorGillon, M
dc.contributor.authorGnilka, C L
dc.contributor.authorGonzales, E
dc.contributor.authorGüdel, M
dc.contributor.authorGünther, M N
dc.contributor.authorHoyer, S
dc.contributor.authorIsaak, K G
dc.contributor.authorJenkins, J M
dc.contributor.authorKiss, L L
dc.contributor.authorLaskar, J
dc.contributor.authorLatham, D W
dc.contributor.authorLaw, N
dc.contributor.authorLecavelier des Etangs, A
dc.contributor.authorCurto, G Lo
dc.contributor.authorLovis, C
dc.contributor.authorLuque, R
dc.contributor.authorMagrin, D
dc.contributor.authorMann, A W
dc.contributor.authorMaxted, P F L
dc.contributor.authorMayor, M
dc.contributor.authorMcDermott, S
dc.contributor.authorMecina, M
dc.contributor.authorMordasini, C
dc.contributor.authorMortier, A
dc.contributor.authorNascimbeni, V
dc.contributor.authorOttensamer, R
dc.contributor.authorPagano, I
dc.contributor.authorPallé, E
dc.contributor.authorPeter, G
dc.contributor.authorPiotto, G
dc.contributor.authorPollacco, D
dc.contributor.authorPritchard, T
dc.contributor.authorRagazzoni, R
dc.contributor.authorRando, N
dc.contributor.authorRatti, F
dc.contributor.authorRauer, H
dc.contributor.authorRibas, I
dc.contributor.authorRicker, G R
dc.contributor.authorRieder, M
dc.contributor.authorSantos, N C
dc.contributor.authorSavel, A B
dc.contributor.authorScandariato, G
dc.contributor.authorSchwarz, R P
dc.contributor.authorSeager, S
dc.contributor.authorSégransan, D
dc.contributor.authorShporer, A
dc.contributor.authorSimon, A E
dc.contributor.authorSmith, A M S
dc.contributor.authorSteller, M
dc.contributor.authorStockdale, C
dc.contributor.authorSzabó, Gy M
dc.contributor.authorThomas, N
dc.contributor.authorTorres, G
dc.contributor.authorTronsgaard, R
dc.contributor.authorUdry, S
dc.contributor.authorUlmer, B
dc.contributor.authorVan Grootel, V
dc.contributor.authorVanderspek, R
dc.contributor.authorVenturini, J
dc.contributor.authorWalton, N A
dc.contributor.authorWinn, J N
dc.contributor.authorWohler, B
dc.date.accessioned2023-07-18T16:30:03Z
dc.date.available2023-07-18T16:30:03Z
dc.date.issued2023-08-01
dc.identifier290728676
dc.identifier3e513be1-5332-4da9-b4c1-13b8f49b909c
dc.identifier85162781287
dc.identifier.citationTuson , A , Queloz , D , Osborn , H P , Wilson , T G , Hooton , M J , Beck , M , Lendl , M , Olofsson , G , Fortier , A , Bonfanti , A , Brandeker , A , Buchhave , L A , Collier Cameron , A , Ciardi , D R , Collins , K A , Gandolfi , D , Garai , Z , Giacalone , S , Gomes da Silva , J , Howell , S B , Patel , J A , Persson , C M , Serrano , L M , Sousa , S G , Ulmer-Moll , S , Vanderburg , A , Ziegler , C , Alibert , Y , Alonso , R , Anglada , G , Bárczy , T , Barrado Navascues , D , Barros , S C C , Baumjohann , W , Beck , T , Benz , W , Billot , N , Bonfils , X , Borsato , L , Broeg , C , Cabrera , J , Charnoz , S , Conti , D M , Csizmadia , S , Cubillos , P E , Davies , M B , Deleuil , M , Delrez , L , Demangeon , O D S , Demory , B-O , Dragomir , D , Dressing , C D , Ehrenreich , D , Erikson , A , Essack , Z , Farinato , J , Fossati , L , Fridlund , M , Furlan , E , Gill , H , Gillon , M , Gnilka , C L , Gonzales , E , Güdel , M , Günther , M N , Hoyer , S , Isaak , K G , Jenkins , J M , Kiss , L L , Laskar , J , Latham , D W , Law , N , Lecavelier des Etangs , A , Curto , G L , Lovis , C , Luque , R , Magrin , D , Mann , A W , Maxted , P F L , Mayor , M , McDermott , S , Mecina , M , Mordasini , C , Mortier , A , Nascimbeni , V , Ottensamer , R , Pagano , I , Pallé , E , Peter , G , Piotto , G , Pollacco , D , Pritchard , T , Ragazzoni , R , Rando , N , Ratti , F , Rauer , H , Ribas , I , Ricker , G R , Rieder , M , Santos , N C , Savel , A B , Scandariato , G , Schwarz , R P , Seager , S , Ségransan , D , Shporer , A , Simon , A E , Smith , A M S , Steller , M , Stockdale , C , Szabó , G M , Thomas , N , Torres , G , Tronsgaard , R , Udry , S , Ulmer , B , Van Grootel , V , Vanderspek , R , Venturini , J , Walton , N A , Winn , J N & Wohler , B 2023 , ' TESS and CHEOPS discover two warm sub-Neptunes transiting the bright K-dwarf HD 15906 ' , Monthly Notices of the Royal Astronomical Society , vol. 523 , no. 2 , pp. 3090-3118 . https://doi.org/10.1093/mnras/stad1369en
dc.identifier.issn0035-8711
dc.identifier.otherJisc: 1151051
dc.identifier.otherORCID: /0000-0002-8863-7828/work/139156706
dc.identifier.urihttps://hdl.handle.net/10023/27985
dc.descriptionFunding: ACC and TW acknowledge support from STFC consolidated grant numbers ST/R000824/1 and ST/V000861/1, and UKSA grant number ST/R003203/1.en
dc.description.abstractWe report the discovery of two warm sub-Neptunes transiting the bright (G = 9.5 mag) K-dwarf HD 15906 (TOI 461, TIC 4646810). This star was observed by the Transiting Exoplanet Survey Satellite (TESS) in sectors 4 and 31, revealing two small transiting planets. The inner planet, HD 15906 b, was detected with an unambiguous period but the outer planet, HD 15906 c, showed only two transits separated by ∼ 734 d, leading to 36 possible values of its period. We performed follow-up observations with the CHaracterising ExOPlanet Satellite (CHEOPS) to confirm the true period of HD 15906 c and improve the radius precision of the two planets. From TESS, CHEOPS, and additional ground-based photometry, we find that HD 15906 b has a radius of 2.24 ± 0.08 R⊕ and a period of 10.924709 ± 0.000032 d, whilst HD 15906 c has a radius of 2.93+0.07-0.06 R⊕ and a period of 21.583298+0.000052-0.000055 d. Assuming zero bond albedo and full day-night heat redistribution, the inner and outer planet have equilibrium temperatures of 668 ± 13 K and 532 ± 10 K, respectively. The HD 15906 system has become one of only six multiplanet systems with two warm (≲ 700 K) sub-Neptune sized planets transiting a bright star (G ≤ 10 mag). It is an excellent target for detailed characterization studies to constrain the composition of sub-Neptune planets and test theories of planet formation and evolution.
dc.format.extent29
dc.format.extent10114167
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen
dc.subjectQB Astronomyen
dc.subjectDASen
dc.subjectMCCen
dc.subject.lccQBen
dc.titleTESS and CHEOPS discover two warm sub-Neptunes transiting the bright K-dwarf HD 15906en
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.doi10.1093/mnras/stad1369
dc.description.statusPeer revieweden
dc.identifier.grantnumberST/R00824/1en
dc.identifier.grantnumberST/V000861/1en


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