activity
20012023
most citedThe BOES spectropolarimeter for Zeeman measurements of stellar magnetic fields

103 citations · 1.7k across the 99 of their papers we have counts for

collaborators
Showing 2020Show all

10 papers · 1 filter

astro-ph.EP2020

OGLE-2017-BLG-1049: Another giant planet microlensing event

Yun Hak Kim, Sun-Ju Chung, A. Udalski +55

We report a giant exoplanet discovery in the microlensing event OGLE-2017-BLG-1049, which is a planet-host star mass ratio of and has a caustic crossin…

astro-ph.EP2020★ 41 cited

KMT-2017-BLG-2820 and the Nature of the Free-Floating Planet Population

Yoon-Hyun Ryu, Przemek Mróz, Andrew Gould +28

We report a new free-floating planet (FFP) candidate, KMT-2017-BLG-2820, with Einstein radius $θ_\e\simeq 6\,\muas$, lens-source relative proper motion $μ_\rel \simeq 8\,\masyr$, a…

astro-ph.GA2020★ 4 cited

Mysterious Globular Cluster System of the Peculiar Massive Galaxy M85

Youkyung Ko, Myung Gyoon Lee, Hong Soo Park +4

We present a study on stellar population and kinematics of globular clusters (GCs) in the peculiar galaxy M85. We obtain optical spectra of 89 GCs at 8 kpc 160 kpc using th…

astro-ph.EP2020★ 13 cited

Four Microlensing Planets with Faint-source Stars Identified in the 2016 and 2017 Season Data

Cheongho Han, Andrzej Udalski, Doeon Kim +32

Microlensing planets occurring on faint source stars can escape detection due to their weak signals. Occasionally, detections of such planets are not reported due to the difficulty…

astro-ph.EP2020

KMT-2018-BLG-0748Lb: Sub-Saturn Microlensing Planet Orbiting an Ultracool Host

Cheongho Han, In-Gu Shin, Youn Kil Jung +18

We announce the discovery of a microlensing planetary system, in which a sub-Saturn planet is orbiting an ultracool dwarf host. We detect the planetary system by analyzing the shor…

astro-ph.EP2020★ 33 cited

KMT-2019-BLG-2073: Fourth Free-Floating-Planet Candidate with $θ_\rm E < 10 \rmμas$

Hyoun-Woo Kim, Kyu-Ha Hwang, Andrew Gould +17

We analyze the very short Einstein timescale ($t_\rm E \simeq 7\,{\rm hr}$) event KMT-2019-BLG-2073. Making use of the pronounced finite-source effects generated by the clump-giant…