Tootfinder

Discovery of a multi-planetary system orbiting the aged Sun-like star HD 224018
M. Damasso, L. Naponiello, A. Anna John, J. A. Egger, M. Cretignier, A. Mortier, A. S. Bonomo, A. Collier Cameron, X. Dumusque, T. Wilson, L. Buchhave, B. Nicholson, M. Stalport, A. Ghedina, D. W. Latham, J. Livingston, L. Malavolta, A. Sozzetti, J. M. Jenkins, G. Mantovan, A. F. Mart\'inez Fiorenzano, L. Palethorpe, R. Tronsgaard, S. Udry, C. A. Watson

Discovery of a multi-planetary system orbiting the aged Sun-like star HD 224018
In 2016, Kepler/K2 detected a system of two sub-Neptunes transiting the star HD 224018, one of them showing a mono-transit event. In 2017, we began a spectroscopic follow-up with HARPS-N to measure the dynamical masses of the planets using radial velocities, and collected additional transit observations using CHEOPS. We measured the fundamental physical parameters of the host star, which is an ``old Sun'' analogue. We analysed radial velocities and photometric time series, also including data b…