Nathan Hara

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)

Aldo Stefano Bonomo, Luca Naponiello, Alessandro Sozzetti, S. Benatti et autres

Sub-Neptunes with planetary radii of Rp ≃ 2–4 R⊕ are the most common planets around solar-type stars in short-period (P < 100 d) orbits. It is still unclear, however, what their most likely composition is, that is whether they are predominantly gas …

Theia: Faint objects in motion or the new astrometry frontier

Celine Boehm, Alberto Krone-Martins, A. Amorim, Guillem Anglada-Escudé et autres

In the context of the ESA M5 (medium mission) call we proposed a new satellite mission, Theia, based on relative astrometry and extreme precision to study the motion of very faint objects in the Universe. Theia is primarily designed to study the …

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Theia: Faint objects in motion or the new astrometry frontier

The Theia Collaboration, Celine Boehm, Alberto Krone-Martins, António Amorim et autres

In the context of the ESA M5 (medium mission) call we proposed a new satellite mission, Theia, based on relative astrometry and extreme precision to study the motion of very faint objects in the Universe. Theia is primarily designed to study the …

Gas-depleted planet formation occurred in the four-planet system around the red dwarf LHS 1903.

Thomas G Wilson, Anna M Simpson, Andrew Collier Cameron, Ryan Cloutier et autres

The radii of small exoplanets form two populations, super-Earths and sub-Neptunes, separated by a gap known as the radius valley. This could be produced by the removal of some atmospheres by stellar or internal heating, or the lack of an initial envelope. …

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