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Investigating the visible phase-curve variability of 55 Cnc e by Valdés, E. A. Meier; Morris, B. M.; Demory, B. -O.; Brandeker, A.; Kitzmann, D.; Benz, W.; Deline, A.; Florén, H. -G.; Sousa, S. G.; Bourrier, V.; Singh, V.; Heng, K.; Strugarek, A.; Bower, D. J.; Jäggi, N.; Carone, L.; Lendl, M.; Jones, K.; Oza, A. V.; Demangeon, O. D. S.; Alibert, Y.; Alonso, R.; Anglada, G.; Asquier, J.; Bárczy, T.; Navascues, D. Barrado; Barros, S. C. C.; Baumjohann, W.; Beck, M.; Beck, T.; Billot, N.; Bonfils, X.; Borsato, L.; Broeg, C.; Cabrera, J.; Charnoz, S.; Cameron, A. Collier; Csizmadia, Sz.; Cubillos, P. E.; Davies, M. B.; Deleuil, M.; Delrez, L.; Ehrenreich, D.; Erikson, A.; Fortier, A.; Fossati, L.; Fridlund, M.; Gandolfi, D.; Gillon, M.; Güdel, M.; Günther, M. N.; Hoyer, S.; Isaak, K. G.; Kiss, L. L.; Laskar, J.; Etangs, A. Lecavelier des; Lovis, C.; Magrin, D.; Maxted, P. F. L.; Mordasini, C.; Nascimbeni, V.; Olofsson, G.; Ottensamer, R.; Pagano, I.; Pallé, E.; Peter, G.; Piotto, G.; Pollacco, D.; Queloz, D.; Ragazzoni, R.; Rando, N.; Rauer, H.; Ribas, I.; Santos, N. C.; Sarajlic, M.; Scandariato, G.; Ségransan, D.; Sicilia, D.; Simon, A. E.; Smith, A. M. S.; Steller, M.; Szabó, Gy. M.; Thomas, N.; Udry, S.; Ulmer, B.; Van Grootel, V.; Venturini, J.; Walton, N. A.; Wilson, T. G.; Wolter, D. is a scholarly article available to read on EtoBox.

What is Investigating the visible phase-curve variability of 55 Cnc e about?

55 Cnc e is an ultra-short period super-Earth transiting a Sun-like star. Previous observations in the optical range detected a time-variable flux modulation that is phased with the planetary orbital period, whose amplitude is too large to be explained by reflected light and thermal emission alone. The goal of the study is to investigate the origin of the variability and timescale of the phase-curve modulation in 55 Cnc e. To this end, we used the CHaracterising ExOPlanet Satellite (CHEOPS), whose exquisite photometric precision provides an opportunity to characterise minute changes in the phase curve from one orbit to the next. CHEOPS observed 29 individual visits of 55 Cnc e between March 2020 and February 2022. Based on these observations, we investigated the different processes that could be at the origin of the observed modulation. In particular, we built a toy model to assess whether a circumstellar torus of dust driven by radiation pressure and gravity might match the observed flux variability timescale. We find that the phase-curve amplitude and peak offset of 55 Cnc e do vary between visits. The sublimation timescales of selected dust species reveal that silicates expected

Author

Valdés, E. A. Meier; Morris, B. M.; Demory, B. -O.; Brandeker, A.; Kitzmann, D.; Benz, W.; Deline, A.; Florén, H. -G.; Sousa, S. G.; Bourrier, V.; Singh, V.; Heng, K.; Strugarek, A.; Bower, D. J.; Jäggi, N.; Carone, L.; Lendl, M.; Jones, K.; Oza, A. V.; Demangeon, O. D. S.; Alibert, Y.; Alonso, R.; Anglada, G.; Asquier, J.; Bárczy, T.; Navascues, D. Barrado; Barros, S. C. C.; Baumjohann, W.; Beck, M.; Beck, T.; Billot, N.; Bonfils, X.; Borsato, L.; Broeg, C.; Cabrera, J.; Charnoz, S.; Cameron, A. Collier; Csizmadia, Sz.; Cubillos, P. E.; Davies, M. B.; Deleuil, M.; Delrez, L.; Ehrenreich, D.; Erikson, A.; Fortier, A.; Fossati, L.; Fridlund, M.; Gandolfi, D.; Gillon, M.; Güdel, M.; Günther, M. N.; Hoyer, S.; Isaak, K. G.; Kiss, L. L.; Laskar, J.; Etangs, A. Lecavelier des; Lovis, C.; Magrin, D.; Maxted, P. F. L.; Mordasini, C.; Nascimbeni, V.; Olofsson, G.; Ottensamer, R.; Pagano, I.; Pallé, E.; Peter, G.; Piotto, G.; Pollacco, D.; Queloz, D.; Ragazzoni, R.; Rando, N.; Rauer, H.; Ribas, I.; Santos, N. C.; Sarajlic, M.; Scandariato, G.; Ségransan, D.; Sicilia, D.; Simon, A. E.; Smith, A. M. S.; Steller, M.; Szabó, Gy. M.; Thomas, N.; Udry, S.; Ulmer, B.; Van Grootel, V.; Venturini, J.; Walton, N. A.; Wilson, T. G.; Wolter, D.

Published

2023

Language

EN