Data di Pubblicazione:
2014
Citazione:
The GAPS programme with HARPS-N at TNG : 4., a planetary system around XO-2S / S. Desidera, A.S. Bonomo, R.U. Claudi, M. Damasso, K. Biazzo, A. Sozzetti, F. Marzari, S. Benatti, D. Gandolfi, R. Gratton, A.F. Lanza, V. Nascimbeni, G. Andreuzzi, L. Affer, M. Barbieri, L.R. Bedin, A. Bignamini, M. Bonavita, F. Borsa, P. Calcidese, J.M. Christille, R. Cosentino, E. Covino, M. Esposito, P. Giacobbe, A. Harutyunyan, D. Latham, M. Lattanzi, G. Leto, G. Lodato, C. Lovis, A. Maggio, L. Malavolta, L. Mancini, A.F. Martinez Fiorenzano, G. Micela, E. Molinari, C. Mordasini, U. Munari, I. Pagano, M. Pedani, F. Pepe, G. Piotto, E. Poretti, M. Rainer, I. Ribas, N.C. Santos, G. Scandariato, R. Silvotti, J. Southworth, R. Zanmar Sanchez. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - 567(2014), pp. L6.1-L6.6.
Abstract:
We performed an intensive radial velocity monitoring of XO-2S, the wide
companion of the transiting planet-host XO-2N, using HARPS-N at TNG in the
framework of the GAPS programme. The radial velocity measurements indicate the
presence of a new planetary system formed by a planet that is slightly more
massive than Jupiter at 0.48 au and a Saturn-mass planet at 0.13 au. Both
planetary orbits are moderately eccentric and were found to be dynamically
stable. There are also indications of a long-term trend in the radial
velocities. This is the first confirmed case of a wide binary whose components
both host planets, one of which is transiting, which makes the XO-2 system a
unique laboratory for understanding the diversity of planetary systems.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Planetary systems; Stars: individual: XO-2N; Stars: individual: XO-2S; Techniques: radial velocities
Elenco autori:
S. Desidera, A.S. Bonomo, R.U. Claudi, M. Damasso, K. Biazzo, A. Sozzetti, F. Marzari, S. Benatti, D. Gandolfi, R. Gratton, A.F. Lanza, V. Nascimbeni, G. Andreuzzi, L. Affer, M. Barbieri, L.R. Bedin, A. Bignamini, M. Bonavita, F. Borsa, P. Calcidese, J.M. Christille, R. Cosentino, E. Covino, M. Esposito, P. Giacobbe, A. Harutyunyan, D. Latham, M. Lattanzi, G. Leto, G. Lodato, C. Lovis, A. Maggio, L. Malavolta, L. Mancini, A.F. Martinez Fiorenzano, G. Micela, E. Molinari, C. Mordasini, U. Munari, I. Pagano, M. Pedani, F. Pepe, G. Piotto, E. Poretti, M. Rainer, I. Ribas, N.C. Santos, G. Scandariato, R. Silvotti, J. Southworth, R. Zanmar Sanchez
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