Amateur contributions to professional publications have increased exponentially over the
last decades in the field of planetary astronomy. Here we review the different domains of the …

In this paper, we review the astrophysical application of gravitational microlensing. After
introducing the history of gravitational lensing, we present the key equations and concept of …

We present adaptive optics imaging from the NIRC2 instrument on the Keck II telescope that
resolves the exoplanet host (and lens) star as it separates from the brighter source star …

We report the discovery of a giant planet in the OGLE-2017-BLG-1522 microlensing event.
The planetary perturbations were clearly identified by high-cadence survey experiments …

Aims. We search for microlensing planets with signals exhibiting no caustic-crossing
features, considering the possibility that such signals may be missed due to their weak and …

We analyze the single microlensing event OGLE-2015-BLG-1482 simultaneously observed
from two ground-based surveys and from Spitzer. The Spitzer data exhibit finite-source …

We present an analysis of the gravitational microlensing event OGLE-2013-BLG-0102. The
light curve of the event is characterized by a strong short-term anomaly superposed on a …

We report the discovery of a Jupiter-mass planet orbiting an M-dwarf star that gave rise to
the microlensing event OGLE-2011-BLG-0265. Such a system is very rare among known …

We present the analysis of the event OGLE-2017-BLG-1186 from the 2017 Spitzer
microlensing campaign. This is a remarkable microlensing event because its source is …

Super-Jupiter-mass planets should form only beyond the snow line of host stars. However,
the core accretion theory of planetary formation does not predict super-Jupiters forming …