A giant exoplanet orbiting a very-low-mass star challenges planet formation models

JC Morales, AJ Mustill, I Ribas, MB Davies, A Reiners… - Science, 2019 - science.org
Surveys have shown that super-Earth and Neptune-mass exoplanets are more frequent than
gas giants around low-mass stars, as predicted by the core accretion theory of planet …

Terrestrial-and Neptune-mass Free-Floating Planet Candidates from the MOA-II 9 yr Galactic Bulge Survey

N Koshimoto, T Sumi, DP Bennett, V Bozza… - The Astronomical …, 2023 - iopscience.iop.org
We report the discoveries of low-mass free-floating planet (FFP) candidates from the
analysis of 2006–2014 MOA-II Galactic bulge survey data. In this data set, we found 6111 …

The exoplanet mass-ratio function from the MOA-II survey: discovery of a break and likely peak at a neptune mass

D Suzuki, DP Bennett, T Sumi, IA Bond… - The Astrophysical …, 2016 - iopscience.iop.org
We report the results of the statistical analysis of planetary signals discovered in MOA-II
microlensing survey alert system events from 2007 to 2012. We determine the survey …

Systematic KMTNet Planetary Anomaly Search. I. OGLE-2019-BLG-1053Lb, a Buried Terrestrial Planet

W Zang, KH Hwang, A Udalski, T Wang… - The Astronomical …, 2021 - iopscience.iop.org
In order to exhume the buried signatures of" missing planetary caustics" in Korea
Microlensing Telescope Network (KMTNet) data, we conducted a systematic anomaly …

The lowest mass ratio planetary microlens: OGLE 2016–BLG–1195Lb

IA Bond, DP Bennett, T Sumi, A Udalski… - Monthly Notices of …, 2017 - academic.oup.com
We report discovery of the lowest mass ratio exoplanet to be found by the microlensing
method in the light curve of the event OGLE 2016–BLG–1195. This planet revealed itself as …

Wide-orbit exoplanets are common. Analysis of nearly 20 years of OGLE microlensing survey data

R Poleski, J Skowron, P Mróz, A Udalski… - arXiv preprint arXiv …, 2021 - arxiv.org
We use nearly 20 years of photometry obtained by the OGLE survey to measure the
occurrence rate of wide-orbit (or ice giant) microlensing planets, ie, with separations from~ 5 …

Predicting stellar angular diameters from V, IC, H and K photometry

AD Adams, TS Boyajian… - Monthly Notices of the …, 2018 - academic.oup.com
Determining the physical properties of microlensing events depends on having accurate
angular sizes of the source star. Using long baseline optical interferometry, we are able to …

Campaign 9 of the K2 Mission: observational parameters, scientific drivers, and community involvement for a simultaneous space-and ground-based microlensing …

CB Henderson, R Poleski, M Penny… - Publications of the …, 2016 - iopscience.iop.org
Abstract K2's Campaign 9 (K2C9) will conduct a∼ 3.7 deg 2 survey toward the Galactic
bulge from 2016 April 22 through July 2 that will leverage the spatial separation between K2 …

The first Neptune analog or super-earth with a Neptune-like orbit: MOA-2013-BLG-605LB

T Sumi, A Udalski, DP Bennett, A Gould… - The Astrophysical …, 2016 - iopscience.iop.org
We present the discovery of the first Neptune analog exoplanet or super-Earth with a
Neptune-like orbit, MOA-2013-BLG-605Lb. This planet has a mass similar to that of Neptune …

Revisiting the microlensing event Ogle 2012-Blg-0026: a solar mass star with two cold giant planets

JP Beaulieu, DP Bennett, V Batista… - The Astrophysical …, 2016 - iopscience.iop.org
Two cold gas giant planets orbiting a G-type main-sequence star in the galactic disk were
previously discovered in the high-magnification microlensing event OGLE-2012-BLG-0026 …