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FLAMINGOS-2 infrared photometry of 2I/Borisov
Chien-Hsiu Lee, Hsing-Wen Lin, Ying-Tung Chen +1
2I/Borisov is the second interstellar object (ISO) after 'Oumuamua (Meech et al. 2017), but differs from 'Oumuamua drastically with its extensive cometary activity. A key ingredien…
OGLE-2015-BLG-1649Lb: A gas giant planet around a low-mass dwarf
Masayuki Nagakane, Chien-Hsiu Lee, Naoki Koshimoto +66
We report the discovery of an exoplanet in microlensing event OGLE-2015-BLG-1649. The planet/host-star mass ratio is and the projected separation normalized…
New Frontiers for Terrestrial-sized to Neptune-sized Exoplanets In the Era of Extremely Large Telescopes
Ji Wang, Michael R. Meyer, Alan Boss +20
Surveys reveal that terrestrial- to Neptune-sized planets (1 4 R) are the most common type of planets in our galaxy. Detecting and characterizing such small…
Identification and characterization of the host stars in planetary microlensing with ELTs
Chien-Hsiu Lee, Rachel Street, Kailash Sahu +1
Microlensing offers a unique opportunity to probe exoplanets that are temperate and beyond the snow line, as small as Jovian satellites, at extragalactic distance, and even free fl…
Exoplanets: past, present, and future
Chien-Hsiu Lee
Our understanding of extra-solar planet systems is highly driven by advances in observations in the past decade. Thanks to high precision spectrograph, we are able to reveal unseen…
The K2-ESPRINT Project III: A Close-in Super-Earth around a Metal-rich Mid-M Dwarf
Teruyuki Hirano, Akihiko Fukui, Andrew W. Mann +18
We validate a planet on a close-in orbit ( days) around K2-28 (EPIC 206318379), a metal-rich M4-type dwarf in the Campaign 3 fiel…
Optical to near-infrared transit observations of super-Earth GJ1214b: water-world or mini-Neptune?
E. J. W. de Mooij, M. Brogi, R. J. de Kok +8
GJ1214b is thought to be either a mini-Neptune with a thick, hydrogen-rich atmosphere, or a planet with a composition dominated by water. In the case of a hydrogen-rich atmosphere,…