Investigating the architecture and internal structure of the TOI-561 system planets with CHEOPS, HARPS-N, and TESS
- Lacedelli, G.
- Wilson, T. G.
- Malavolta, L.
- Hooton, M. J.
- Collier Cameron, A.
- Alibert, Y.
- Mortier, A.
- Bonfanti, A.
- Haywood, R. D.
- Hoyer, S.
- Piotto, G.
- Bekkelien, A.
- Vanderburg, A. M.
- Benz, W.
- Dumusque, X.
- Deline, A.
- López-Morales, M.
- Borsato, L.
- Rice, K.
- Fossati, L.
- Latham, D. W.
- Brandeker, A.
- Poretti, E.
- Sousa, S. G.
- Sozzetti, A.
- Salmon, S.
- Burke, C. J.
- van Grootel, V.
- Fausnaugh, M. M.
- Adibekyan, V.
- Huang, C. X.
- Osborn, H. P.
- Mustill, A. J.
- Pallé, E.
- Bourrier, V.
- Nascimbeni, V.
- Alonso, R.
- Anglada, G.
- Bárczy, T.
- Barrado y Navascues, D.
- Barros, S. C. C.
- Baumjohann, W.
- Beck, M.
- Beck, T.
- Billot, N.
- Bonfils, X.
- Broeg, C.
- Buchhave, L. A.
- Cabrera, J.
- Charnoz, S.
- Cosentino, R.
- Csizmadia, Sz
- Davies, M. B.
- Deleuil, M.
- Delrez, L.
- Demangeon, O.
- Demory, B. -O.
- Ehrenreich, D.
- Erikson, A.
- Esparza-Borges, E.
- Florén, H. G.
- Fortier, A.
- Fridlund, M.
- Futyan, D.
- Gandolfi, D.
- Ghedina, A.
- Gillon, M.
- Güdel, M.
- Guterman, P.
- Harutyunyan, A.
- Heng, K.
- Isaak, K. G.
- Jenkins, J. M.
- Kiss, L.
- Laskar, J.
- Lecavelier Des Etangs, A.
- Lendl, M.
- Lovis, C.
- Magrin, D.
- Marafatto, L.
- Martinez Fiorenzano, A. F.
- Maxted, P. F. L.
- Mayor, M.
- Micela, G.
- Molinari, E.
- Murgas, F.
- Narita, N.
- Olofsson, G.
- Ottensamer, R.
- Pagano, I.
- Pasetti, A.
- Pedani, M.
- Pepe, F. A.
- Peter, G.
- Phillips, D. F.
- Pollacco, D.
- Queloz, D.
- Ragazzoni, R.
- Rando, N.
- Ratti, F.
- Rauer, H.
- Ribas, I.
- Santos, N. C.
- Sasselov, D.
- Scandariato, G.
- Seager, S.
- Ségransan, D.
- Serrano, L. M.
- Simon, A. E.
- Smith, A. M. S.
- Steinberger, M.
- Steller, M.
- Szabó, Gy
- Thomas, N.
- Twicken, J. D.
- Udry, S.
- Walton, N.
- Winn, J. N.
DOIAbstract
International audienceWe present a precise characterization of the TOI-561 planetary system obtained by combining previously published data with TESS and CHEOPS photometry, and a new set of 62 HARPS-N radial velocities (RVs). Our joint analysis confirms the presence of four transiting planets, namely TOI-561 b (P = 0.45 d, R = 1.42 R⊕, M = 2.0 M⊕), c (P = 10.78 d, R = 2.91 R⊕, M = 5.4 M⊕), d (P = 25.7 d, R = 2.82 R⊕, M = 13.2 M⊕), and e (P = 77 d, R = 2.55 R⊕, M = 12.6 R⊕). Moreover, we identify an additional, long-period signal (>450 d) in the RVs, which could be due to either an external planetary companion or to stellar magnetic activity. The precise masses and radii obtained for the four planets allowed us to conduct interior structure ...
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