CHEOPS precision phase curve of the Super-Earth 55 Cancri e
| Autor: | Luca Fossati, M. Fridlund, Giampaolo Piotto, M. Beck, D. L. Pollacco, G. Olofsson, M. Deleuil, K. G. Isaak, Alexis Brandeker, P. Guterman, A. Lecavelier des Etangs, Nicolas Billot, Heike Rauer, Michaël Gillon, Anders Erikson, N. C. Santos, Laetitia Delrez, Andrew Collier Cameron, T. G. Wilson, Wolfgang Baumjohann, D. Segransan, Yann Alibert, C. Lovis, Kevin Heng, C. Broeg, Gisbert Peter, B. Ulmer, Manuel Guedel, B. O. Demory, Sergio Hoyer, Monika Lendl, Mahmoudreza Oshagh, Melvyn B. Davies, Brett M. Morris, J. Cabrera, Roberto Ragazzoni, Gy. M. Szabó, D. Queloz, Vincent Bourrier, S. G. Sousa, A. García Muñoz, Davide Gandolfi, Jacques Laskar, Willy Benz, S. Charnoz, Francisco J. Pozuelos, T. Bárczy, Nicola Rando, Thomas Beck, D. De Miguel Ferreras, David Ehrenreich, Pierre F. L. Maxted, G. Anglada Escudé, S. C. C. Barros, H. G. Floren, A. Deline, László L. Kiss, A. Bekkelien, M. Steller, D. Futyan, G. Scandariato, A. M. Smith, S. Sulis, I. Pagano, O. D. S. Demangeon, I. Ribas, M. Lieder, A. E. Simon, X. Bonfils, Andrea Fortier, Maria Bergomi, Roland Ottensamer, V. Nascimbeni, Demetrio Magrin, N. Thomas, David Barrado, Enric Palle, A. Pizarro Rubio, Roi Alonso, Stéphane Udry, N. A. Walton, Valérie Van Grootel |
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| Přispěvatelé: | Cavendish Laboratory, University of Cambridge [UK] (CAM), Stockholm University, Institut für Festkörper- und Materialphysik, Technische Universität Dresden, Technische Universität Dresden = Dresden University of Technology (TU Dresden), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Center for Space and Habitability (CSH), University of Bern, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Centre National d'Études Spatiales [Toulouse] (CNES)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France -Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France, Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Science & Technology Facilities Council, University of St Andrews. School of Physics and Astronomy, University of St Andrews. St Andrews Centre for Exoplanet Science, Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA), Swiss Space Office, Swiss National Science Foundation, European Commission, Fundação para a Ciência e a Tecnologia (Portugal), Queloz, Didier [0000-0002-3012-0316], Walton, Nicholas [0000-0003-3983-8778], Apollo - University of Cambridge Repository |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Atmospheres
010504 meteorology & atmospheric sciences 55 Cnc individual: 55 Cnc e [Planets and satellites] Astrophysics 01 natural sciences techniques: photometric Spitzer Space Telescope Planet QB460 Methods QB Astronomy Astrophysics::Solar and Stellar Astrophysics 010303 astronomy & astrophysics Observational Instrumentation QC planets and satellites: individual: 55 Cnc e Eclipse QB Earth and Planetary Astrophysics (astro-ph.EP) Physics planets and satellites: atmospheres Super-Earth 520 Astronomy Planets and Satellites Exoplanet instrumentation: photometers Amplitude atmospheres [Planets and satellites] Astrophysics::Earth and Planetary Astrophysics methods: observational individual: 55 Cnc [Stars] FOS: Physical sciences Individual Photometric Photometry (optics) stars: individual: 55 Cnc 0103 physical sciences observational [Methods] invidual: 55 Cnc [Stars] QB600 0105 earth and related environmental sciences MCC Photometers Stars: invidual: 55 Cnc photometric [Techniques] Astronomy and Astrophysics DAS Phase curve 620 Engineering Stars Techniques photometers [Instrumentation] QC Physics 13. Climate action Space and Planetary Science Instrumentation: photometers Methods: observational Planets and satellites: atmospheres Planets and satellites: individual: 55 Cnc e Stars: individual: 55 Cnc Techniques: photometric [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] 55 Cnc e Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | Astronomy and Astrophysics-A&A Astronomy and Astrophysics-A&A, 2021, 653, pp.A173. ⟨10.1051/0004-6361/202140892⟩ Astronomy and Astrophysics, 653 Astronomy and Astrophysics-A&A, EDP Sciences, 2021, 653, pp.A173. ⟨10.1051/0004-6361/202140892⟩ Digital.CSIC. Repositorio Institucional del CSIC instname Astronomy & Astrophysics |
| ISSN: | 1432-0746 0004-6361 |
| Popis: | Morris, B. M. et al. [Context] 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. Centre of Competence in Research (NCCR) supported by the Swiss National Science Foundation (SNSF). CHEOPS is an ESA mission in partnership with Switzerland with important contributions to the payload and the ground segment from Austria, Belgium, France, Germany, Hungary, Italy, Portugal, Spain, Sweden, and the United Kingdom. The Swiss participation to CHEOPS has been supported by the Swiss Space Office (SSO) in the framework of the Prodex programme and the Activités Nationales Complémentaires (ANC), the Universities of Bern and Geneva as well as of the NCCR PlanetS and the Swiss National Science Foundation. This work benefited from support from the Swiss National Science Foundation (PP00P2-163967 and PP00P2-190080). 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. K.G.I. is the ESA CHEOPS Project Scientist and is responsible for the ESA CHEOPS Guest Observers Programme. |
| Databáze: | OpenAIRE |
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