55 Cancri e's occultation captured with CHEOPS

• Type: Article in International Scientific Journal
• Date: 2023

Authors

Demory, BO (Author) Other; Sulis, S (Author) Other; Valdes, EM (Author) Other; Delrez, L (Author) Other; Brandeker, A (Author) Other; Billot, N (Author) Other; Fortier, A (Author) Other; Hoyer, S (Author) Other; Sousa, SG (Author) Other; Heng, K (Author) Other; Lendl, M (Author) Other; Krenn, A (Author) Other; Morris, BM (Author) Other; Patel, JA (Author) Other; Alibert, Y (Author) Other; Alonso, R (Author) Other; Anglada, G (Author) Other; Barczy, T (Author) Other; Barrado, D (Author) Other; Barros, SCC (Author) FCUP; Baumjohann, W (Author) Other; Beck, M (Author) Other; Beck, T (Author) Other; Benz, W (Author) Other; Bonfils, X (Author) Other; Broeg, C (Author) Other; Buder, M (Author) Other; Cabrera, J (Author) Other; Charnoz, S (Author) Other; Cameron, AC (Author) Other; Cottard, H (Author) Other; Csizmadia, S (Author) Other; Davies, MB (Author) Other; Deleuil, M (Author) Other; Demangeon, ODS (Author) Other; Ehrenreich, D (Author) Other; Erikson, A (Author) Other; Fossati, L (Author) Other; Fridlund, M (Author) Other; Gandolfi, D (Author) Other; Gillon, M (Author) Other; Gudel, M (Author) Other; Isaak, KG (Author) Other; Kiss, LL (Author) Other; Laskar, J (Author) Other; des Etangs, AL (Author) Other; Lovis, C (Author) Other; Luntzer, A (Author) Other; Magrin, D (Author) Other; Marafatto, L (Author) Other; Maxted, PFL (Author) Other; Nascimbeni, V (Author) Other; Olofsson, G (Author) Other; Ottensamer, R (Author) Other; Pagano, I (Author) Other; Palle, E (Author) Other; Peter, G (Author) Other; Piotto, G (Author) Other; Pollacco, D (Author) Other; Queloz, D (Author) Other; Ragazzoni, R (Author) Other; Rando, N (Author) Other; Ratti, F (Author) Other; Rauer, H (Author) Other; Ribas, I (Author) Other; N.C. Santos (Author) FCUP; Scandariato, G (Author) Other; Segransan, D (Author) Other; Simon, AE (Author) Other; Smith, AMS (Author) Other; Steller, M (Author) Other; Szabo, GM (Author) Other; Thomas, N (Author) Other; Udry, S (Author) Other; Van Grootel, V (Author) Other; Walton, NA (Author) Other

Journal

Title: Astronomy and Astrophysics

Vol. 669

Final page: A64

ISSN: 0004-6361

Publisher: EDP Sciences

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 3 Citations

Other information

Authenticus ID: P-00X-VKA

DOI: 10.1051/0004-6361/202244894

Abstract (EN): Past occultation and phase-curve observations of the ultra-short period super-Earth 55 Cnc e obtained at visible and infrared wavelengths have been challenging to reconcile with a planetary reflection and emission model. In this study, we analyse a set of 41 occultations obtained over a two-year timespan with the CHEOPS satellite. We report the detection of 55 Cnc e's occultation with an average depth of 12 +/- 3 ppm. We derive a corresponding 2 sigma upper limit on the geometric albedo of A(g) < 0.55 once decontaminated from the thermal emission measured by Spitzer at 4.5 mu m. CHEOPS's photometric performance enables, for the first time, the detection of individual occultations of this super-Earth in the visible and identifies short-timescale photometric corrugations likely induced by stellar granulation. We also find a clear 47.3-day sinusoidal pattern in the time-dependent occultation depths that we are unable to relate to stellar noise, nor instrumental systematics, but whose planetary origin could be tested with upcoming JWST occultation observations of this iconic super-Earth.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10