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89 papers · 1 filter
Constraining the orbit of the retrograde planet in the Octantis system
Alan Cefali Signor, Alexandre C. M. Correia, Maria Helena Moreira Morais +4
The Octantis system is composed of a compact stellar binary and a retrograde S-type planet orbiting near the edge of stability. Here, we investigate the dynamically viable arch…
The Neptunian ridge as a natural outcome of high-eccentricity tidal migration
A. Castro-González, V. Bourrier, D. Ehrenreich +3
Recent occurrence-rate analyses have shown that the transition between the Neptunian desert and the savanna is not smooth but instead exhibits an overdensity of planets at $P_{\rm…
The multi-planet system TOI-5624: Four transiting sub-Neptunes with an outer companion revealed by transit-timing variations
A. Bonfanti, D. Gandolfi, P. Leonardi +96
Following the 2022 alert of a TESS object of interest transiting TOI-5624 (a G7 V star 100 pc away), a CHEOPS campaign in 2023 detected four planetary signals at $P_b\approx3…
Modelling solar radial velocities and photometric variability with SOAPv4
Alba Barka, Eduardo Cristo, Ângela R. G. Santos +5
Stellar activity remains one of the main limitations in the detection of Earth-like planets using radial velocity (RV) measurements. The Sun, as the only star for which surface fea…
A generalized dipole-segment model for the gravitational field of elongated bodies
A. K. de Almeida, A. F. S. Ferreira, L. B. T. Santos +6
Context. Various simplified models have been investigated to understand the complex dynamical environment near irregular asteroids. We propose a generalized dipole-segment model (G…
A search for transit timing variations in the transiting hot Jupiter systems HIP 65, NGTS-6, NGTS-10 and WASP-173
A. W. Griffiths, J. Southworth, L. Alegre +30
Hot Jupiters are Jupiter-mass planets with orbital periods of less than ten days. Their short orbital separations make tidal dissipation within the stellar host especially efficien…