The rapid growth of observed exoplanets has revealed the existence of several distinct
planetary populations in the mass–period diagram. Two of the most surprising are (1) the …

The large number of observed exoplanets (≳ 700) provides important constraints on their
origin as deduced from the mass–period diagram of planets. The most surprising features in …

We propose that two of the most surprising results so far among exoplanet discoveries are
related: the existences of both hot Jupiters and the high frequency of multi-planet systems …

Aims. We study the dependence of protoplanetary disk evolution on stellar mass using a
large sample of young stellar objects in nearby young star-forming regions. Methods. We …

ABSTRACT I explore whether close-in super-Earths were formed as rocky bodies that failed
to grow fast enough to become the cores of gas giants before the natal protostellar disk …

The origin of a recently discovered close-in Neptune-mass planet around GJ 436 poses a
challenge to the current theories of planet formation. On the basis of the sequential accretion …

Recent ALMA observations may indicate a surprising abundance of sub-Jovian planets on
very wide orbits in protoplanetary discs that are only a few million years old. These planets …

Massive exoplanets are observed preferentially around high metallicity ([Fe/H]) stars while
low-mass exoplanets do not show such an effect. This so-called planet–metallicity …

ABSTRACT Planets of 1–4 times Earth's size on orbits shorter than 100 days exist around 30–
50% of all Sun-like stars. In fact, the Solar System is particularly outstanding in its lack of" hot …

The ubiquity of planets and diversity of planetary systems reveal that planet formation
encompasses many complex and competing processes. In this series of papers, we develop …