The GAPS programme at TNG LXXI. A sub-Neptune suitable for atmospheric characterization in a multiplanet and mutually inclined system orbiting the bright K dwarf TOI-5789 (HIP 99452)

A. S. Bonomo, L. Naponiello, A. Sozzetti +37

Sub-Neptunes with planetary radii of $R_p\simeq 2-4R_{\oplus }$ are the most common planets around solar-type stars in short-period ($P<100$ d) orbits. It is still unclear, howe…