The mass of a star is the most fundamental parameter for its structure, evolution, and final
fate. It is particularly important for any kind of stellar archaeology and characterization of …

The exoplanet population characterized by relatively short orbital periods (P< 100 d) around
solar-type stars is dominated by super-Earths and sub-Neptunes. However, these planets …

With sizable volatile envelopes but smaller radii than the solar system ice giants, sub-
Neptunes have been revealed as one of the most common types of planet in the galaxy …

We present the discovery and characterisation of two transiting planets observed by the
Transiting Exoplanet Survey Satellite (TESS) orbiting the nearby (d⋆≈ 22 pc), bright (J≈ 9 …

Of the nine confirmed transiting circumbinary planet systems, only Kepler-47 is known to
contain more than one planet. Kepler-47 b (the" inner planet") has an orbital period of 49.5 …

We present a search for helium in the upper atmospheres of three sub-Neptune-sized
planets to investigate the origins of these ubiquitous objects. The detection of helium for a …

We present a precise characterization of the TOI-561 planetary system obtained by
combining previously published data with TESS and CHEOPS photometry, and a new set of …

Terrestrial planets have been found orbiting Sun-like stars with extremely short periods—
some as short as 4 hr. These" ultra-short-period planets" or" hot Earths" are so strongly …

Hot Jupiters orbiting extremely close to their host star may experience atmospheric escape
due to the large amounts of high-energy radiation they receive. Understanding the …

GJ 9827 is a bright, nearby K7V star orbited by two super-Earths and one mini-Neptune on
close-in orbits. The system was first discovered using K2 data and then further characterized …