Search Results for author: C. M. Persson

Found 6 papers, 4 papers with code

Six transiting planets and a chain of Laplace resonances in TOI-178

no code implementations22 Jan 2021 A. Leleu, Y. Alibert, N. C. Hara, M. J. Hooton, T. G. Wilson, P. Robutel, J. -B. Delisle, J. Laskar, S. Hoyer, C. Lovis, E. M. Bryant, E. Ducrot, J. Cabrera, L. Delrez, J. S. Acton, V. Adibekyan, R. Allart, C. Allende Prieto, R. Alonso, D. Alves, D. R. Anderson, D. Angerhausen, G. Anglada Escudé, J. Asquier, D. Barrado, S. C. C. Barros, W. Baumjohann, D. Bayliss, M. Beck, T. Beck, A. Bekkelien, W. Benz, N. Billot, A. Bonfanti, X. Bonfils, F. Bouchy, V. Bourrier, G. Boué, A. Brandeker, C. Broeg, M. Buder, A. Burdanov, M. R. Burleigh, T. Bárczy, A. C. Cameron, S. Chamberlain, S. Charnoz, B. F. Cooke, C. Corral Van Damme, A. C. M. Correia, S. Cristiani, M. Damasso, M. B. Davies, M. Deleuil, O. D. S. Demangeon, B. -O. Demory, P. Di Marcantonio, G. Di Persio, X. Dumusque, D. Ehrenreich, A. Erikson, P. Figueira, A. Fortier, L. Fossati, M. Fridlund, D. Futyan, D. Gandolfi, A. García Muñoz, L. J. Garcia, S. Gill, E. Gillen, M. Gillon, M. R. Goad, J. I. González Hernández, M. Guedel, M. N. Günther, J. Haldemann, B. Henderson, K. Heng, A. E. Hogan, K. Isaak, E. Jehin, J. S. Jenkins, A. Jordán, L. Kiss, M. H. Kristiansen, K. Lam, B. Lavie, A. Lecavelier des Etangs, M. Lendl, J. Lillo-Box, G. Lo Curto, D. Magrin, C. J. A. P. Martins, P. F. L. Maxted, J. McCormac, A. Mehner, G. Micela, P. Molaro, M. Moyano, C. A. Murray, V. Nascimbeni, N. J. Nunes, G. Olofsson, H. P. Osborn, M. Oshagh, R. Ottensamer, I. Pagano, E. Pallé, P. P. Pedersen, F. A. Pepe, C. M. Persson, G. Peter, G. Piotto, G. Polenta, D. Pollacco, E. Poretti, F. J. Pozuelos, D. Queloz, R. Ragazzoni, N. Rando, F. Ratti, H. Rauer, L. Raynard, R. Rebolo, C. Reimers, I. Ribas, N. C. Santos, G. Scandariato, J. Schneider, D. Sebastian, M. Sestovic, A. E. Simon, A. M. S. Smith, S. G. Sousa, A. Sozzetti, M. Steller, A. Suárez Mascareño, Gy. M. Szabó, D. Ségransan, N. Thomas, S. Thompson, R. H. Tilbrook, A. Triaud, O. Turner, S. Udry, V. Van Grootel, H. Venus, F. Verrecchia, J. I. Vines, N. A. Walton, R. G. West, P. J. Wheatley, D. Wolter, M. R. Zapatero Osorio

All planets but the innermost one form a 2:4:6:9:12 chain of Laplace resonances, and the planetary densities show important variations from planet to planet, jumping from 1. 02(+0. 28/-0. 23) to 0. 177(+0. 055/-0. 061) times the Earth's density between planets c and d. Using Bayesian interior structure retrieval models, we show that the amount of gas in the planets does not vary in a monotonous way, contrary to what one would expect from simple formation and evolution models and unlike other known systems in a chain of Laplace resonances.

Earth and Planetary Astrophysics

Mass determination of the 1:3:5 near-resonant planets transiting GJ 9827 (K2-135)

1 code implementation26 Feb 2018 J. Prieto-Arranz, E. Palle, D. Gandolfi, O. Barragán, E. W. Guenther, F. Dai, M. Fridlund, T. Hirano, J. Livingston, P. Niraula, C. M. Persson, S. Redfield, S. Albrecht, R. Alonso, G. Antoniciello, J. Cabrera, W. D. Cochran, Sz. Csizmadia, H. Deeg, Ph. Eigmüller, M. Endl, A. Erikson, M. E. Everett, A. Fukui, S. Grziwa, A. P. Hatzes, D. Hidalgo, M. Hjorth, J. Korth, D. Lorenzo-Oliveira, F. Murgas, N. Narita, D. Nespral, G. Nowak, M. Pätzold, P. Montañés Rodríguez, H. Rauer, I. Ribas, A. M. S. Smith, V. Van Eylen, J. N. Winn

We also find that the planetary bulk compositions are compatible with a scenario where all three planets formed with similar core/atmosphere compositions, and we speculate that while GJ 9827 b and GJ 9827 c lost their atmospheric envelopes, GJ 9827 d maintained its atmosphere, owing to the much lower stellar irradiation.

Earth and Planetary Astrophysics

K2-139 b: a low-mass warm Jupiter on a 29-day orbit transiting an active K0 V star

1 code implementation2 Feb 2017 O. Barragán, D. Gandolfi, A. M. S. Smith, H. J. Deeg, M. C. V. Fridlund, C. M. Persson, P. Donati, M. Endl, Sz. Csizmadia, S. Grziwa, D. Nespral, A. P. Hatzes, W. D. Cochran, L. Fossati, S. S. Brems, J. Cabrera, F. Cusano, Ph. Eigmüller, C. Eiroa, A. Erikson, E. Guenther, J. Korth, D. Lorenzo-Oliveira, L. Mancini, M. Pätzold, J. Prieto-Arranz, H. Rauer, I. Rebollido, J. Saario, O. V. Zakhozhay

We announce the discovery of K2-139 b (EPIC 218916923 b), a transiting warm-Jupiter ($T_\mathrm{eq}$=547$\pm$25 K) on a 29-day orbit around an active (log $R^\prime_\mathrm{HK}$ = $-$4. 46 $\pm$ 0. 06) K0 V star in K2 Campaign 7.

Earth and Planetary Astrophysics Solar and Stellar Astrophysics

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