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dc.contributor.authorMorris, B. M.
dc.contributor.authorDelrez, L.
dc.contributor.authorBrandeker, A.
dc.contributor.authorCameron, A. C.
dc.contributor.authorSimon, A. E.
dc.contributor.authorFutyan, D.
dc.contributor.authorOlofsson, G.
dc.contributor.authorHoyer, S.
dc.contributor.authorFortier, A.
dc.contributor.authorDemory, B.-O.
dc.contributor.authorLendl, M.
dc.contributor.authorWilson, T. G.
dc.contributor.authorOshagh, M.
dc.contributor.authorHeng, K.
dc.contributor.authorEhrenreich, D.
dc.contributor.authorSulis, S.
dc.contributor.authorAlibert, Y.
dc.contributor.authorAlonso, R.
dc.contributor.authorAnglada Escudé, G.
dc.contributor.authorBarrado, D.
dc.contributor.authorBarros, S. C. C.
dc.contributor.authorBaumjohann, W.
dc.contributor.authorBeck, M.
dc.contributor.authorBeck, T.
dc.contributor.authorBekkelien, A.
dc.contributor.authorBenz, W.
dc.contributor.authorBergomi, M.
dc.contributor.authorBillot, N.
dc.contributor.authorBonfils, X.
dc.contributor.authorBourrier, V.
dc.contributor.authorBroeg, C.
dc.contributor.authorBárczy, T.
dc.contributor.authorCabrera, J.
dc.contributor.authorCharnoz, S.
dc.contributor.authorDavies, M. B.
dc.contributor.authorDe Miguel Ferreras, D.
dc.contributor.authorDeleuil, M.
dc.contributor.authorDeline, A.
dc.contributor.authorDemangeon, O. D. S.
dc.contributor.authorErikson, A.
dc.contributor.authorFloren, H. G.
dc.contributor.authorFossati, L.
dc.contributor.authorFridlund, M.
dc.contributor.authorGandolfi, D.
dc.contributor.authorGarcía Muñoz, A.
dc.contributor.authorGillon, M.
dc.contributor.authorGuedel, M.
dc.contributor.authorGuterman, P.
dc.contributor.authorIsaak, K.
dc.contributor.authorKiss, L.
dc.contributor.authorLaskar, J.
dc.contributor.authorLecavelier Des Etangs, A.
dc.contributor.authorLieder, M.
dc.contributor.authorLovis, C.
dc.contributor.authorMagrin, D.
dc.contributor.authorMaxted, P. F. L.
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.authorPizarro Rubio, A.
dc.contributor.authorPollacco, D.
dc.contributor.authorPozuelos, F. J.
dc.contributor.authorQueloz, D.
dc.contributor.authorRagazzoni, R.
dc.contributor.authorRando, N.
dc.contributor.authorRauer, H.
dc.contributor.authorRibas, I.
dc.contributor.authorSantos, N. C.
dc.contributor.authorScandariato, G.
dc.contributor.authorSmith, A. M. S.
dc.contributor.authorSousa, S. G.
dc.contributor.authorSteller, M.
dc.contributor.authorSzabó, Gy. M.
dc.contributor.authorSégransan, D.
dc.contributor.authorThomas, N.
dc.contributor.authorUdry, S.
dc.contributor.authorUlmer, B.
dc.contributor.authorVan Grootel, V.
dc.contributor.authorWalton, N. A.
dc.date.accessioned2021-10-14T15:30:13Z
dc.date.available2021-10-14T15:30:13Z
dc.date.issued2021-09-30
dc.identifier.citationMorris , B M , Delrez , L , Brandeker , A , Cameron , A C , Simon , A E , Futyan , D , Olofsson , G , Hoyer , S , Fortier , A , Demory , B-O , Lendl , M , Wilson , T G , Oshagh , M , Heng , K , Ehrenreich , D , Sulis , S , Alibert , Y , Alonso , R , Anglada Escudé , G , Barrado , D , Barros , S C C , Baumjohann , W , Beck , M , Beck , T , Bekkelien , A , Benz , W , Bergomi , M , Billot , N , Bonfils , X , Bourrier , V , Broeg , C , Bárczy , T , Cabrera , J , Charnoz , S , Davies , M B , De Miguel Ferreras , D , Deleuil , M , Deline , A , Demangeon , O D S , Erikson , A , Floren , H G , Fossati , L , Fridlund , M , Gandolfi , D , García Muñoz , A , Gillon , M , Guedel , M , Guterman , P , Isaak , K , Kiss , L , Laskar , J , Lecavelier Des Etangs , A , Lieder , M , Lovis , C , Magrin , D , Maxted , P F L , Nascimbeni , V , Ottensamer , R , Pagano , I , Pallé , E , Peter , G , Piotto , G , Pizarro Rubio , A , Pollacco , D , Pozuelos , F J , Queloz , D , Ragazzoni , R , Rando , N , Rauer , H , Ribas , I , Santos , N C , Scandariato , G , Smith , A M S , Sousa , S G , Steller , M , Szabó , G M , Ségransan , D , Thomas , N , Udry , S , Ulmer , B , Van Grootel , V & Walton , N A 2021 , ' CHEOPS precision phase curve of the Super-Earth 55 Cancri e ' , Astronomy & Astrophysics , vol. 653 , A173 . https://doi.org/10.1051/0004-6361/202140892en
dc.identifier.issn0004-6361
dc.identifier.otherPURE: 276279933
dc.identifier.otherPURE UUID: c21e468d-51d8-419f-8b26-20b9807949ac
dc.identifier.otherRIS: urn:425FF89DEEF872446D5976E96477B631
dc.identifier.otherWOS: 000701999500001
dc.identifier.othercrossref: 10.1051/0004-6361/202140892
dc.identifier.otherORCID: /0000-0002-8863-7828/work/101581424
dc.identifier.otherORCID: /0000-0001-8749-1962/work/101582032
dc.identifier.otherScopus: 85116480065
dc.identifier.urihttps://hdl.handle.net/10023/24144
dc.descriptionFunding: This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (project FOUR ACES; grant agreement No 724427). This work was supported by FCT – Fundação para a Ciência e a Tecnologia through national funds and by FEDER through COMPETE2020 - Programa Operacional Competitividade e Internacionalização by these grants: UID/FIS/04434/2019; UIDB/04434/2020; UIDP/04434/2020; PTDC/FIS-AST/32113/2017 and POCI-01-0145-FEDER-032113; PTDC/FIS-AST/28953/2017 and POCI-01-0145-FEDER-028953; PTDC/FIS-AST/28987/2017 and POCI-01-0145-FEDER-028987. S.C.C.B. and S.G.S. acknowledge support from FCT through FCT contracts nr. IF/01312/2014/CP1215/CT0004, IF/00028/2014/CP1215/CT0002. O.D.S.D. is supported in the form of work contract (DL 57/2016/CP1364/CT0004) funded by national funds through Fundação para a Ciência e Tecnologia (FCT). X.B., S.C., D.G., M.F. and J.L. acknowledge their roles as ESA-appointed CHEOPS science team members. A.C.C. and T.W. acknowledge support from STFC consolidated grant number ST/R000824/1. This project was supported by the CNES. S.H. gratefully acknowledges CNES funding through the grant 837319. P.M. acknowledges support from STFC consolidated grant number ST/M001040/1.en
dc.description.abstractContext. 55 Cnc e is a transiting super-Earth (radius 1.88 R⊕ and mass 8 M⊕) orbiting a G8V host star on a 17-h orbit. Spitzer observations of the planet's phase curve at 4.5 μm revealed a time-varying occultation depth, and MOST optical observations are consistent with a time-varying phase curve amplitude and phase offset of maximum light. Both broadband and high-resolution spectroscopic analyses are consistent with either a high mean molecular weight atmosphere or no atmosphere for planet e. A long-term photometric monitoring campaign on an independent optical telescope is needed to probe the variability in this system. Aims. We seek to measure the phase variations of 55 Cnc e with a broadband optical filter with the 30 cm effective aperture space telescope CHEOPS and explore how the precision photometry narrows down the range of possible scenarios. Methods. We observed 55 Cnc for 1.6 orbital phases in March of 2020. We designed a phase curve detrending toolkit for CHEOPS photometry which allowed us to study the underlying flux variations in the 55 Cnc system. Results. We detected a phase variation with a full-amplitude of 72 ± 7 ppm, but did not detect a significant secondary eclipse of the planet. The shape of the phase variation resembles that of a piecewise-Lambertian; however, the non-detection of the planetary secondary eclipse, and the large amplitude of the variations exclude reflection from the planetary surface as a possible origin of the observed phase variations. They are also likely incompatible with magnetospheric interactions between the star and planet, but may imply that circumplanetary or circumstellar material modulate the flux of the system. Conclusions. This year, further precision photometry of 55 Cnc from CHEOPS will measure variations in the phase curve amplitude and shape over time.
dc.format.extent15
dc.language.isoeng
dc.relation.ispartofAstronomy & Astrophysicsen
dc.rightsCopyright © ESO 2021. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the final published version of the work, which was originally published at https://doi.org/10.1051/0004-6361/202140892 .en
dc.subjectTechniques: photometricen
dc.subjectMethods: observationalen
dc.subjectPlanets and satellites: atmospheresen
dc.subjectStars: individual: 55 Cncen
dc.subjectPlanets and satellites: individual: 55 Cnc een
dc.subjectInstrumentation: photometersen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subjectDASen
dc.subjectMCCen
dc.subject.lccQBen
dc.subject.lccQCen
dc.titleCHEOPS precision phase curve of the Super-Earth 55 Cancri een
dc.typeJournal articleen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.description.versionPublisher PDFen
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/10.1051/0004-6361/202140892
dc.description.statusPeer revieweden
dc.identifier.urlhttps://arxiv.org/abs/2106.07443en
dc.identifier.grantnumberST/R00824/1en


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