190 citations · 2.3k across the 140 of their papers we have counts for
18 papers · 1 filter
Mid-Infrared PeriodLuminosity Relations for Miras in the Large Magellanic Cloud
Patryk Iwanek, Igor Soszyński, Szymon Kozłowski
We present the mid-infrared (mid-IR) periodluminosity relations (PLRs) using over 1000 Mira variables in the Large Magellanic Cloud (LMC), for the four Wide-Field Infrared Surve…
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…
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…
OGLE-2018-BLG-0799Lb: a Planet with Spitzer Parallax
Weicheng Zang, Yossi Shvartzvald, Andrzej Udalski +73
We report the discovery and analysis of a planet in the microlensing event OGLE-2018-BLG-0799. The planetary signal was observed by several ground-based telescopes, and the planet-…
OGLE-GAL-ACEP-091 -- The First Known Multi-Mode Anomalous Cepheid
I. Soszyński, R. Smolec, A. Udalski +12
Anomalous Cepheids (ACs) are metal-deficient, core-helium-burning pulsating stars with masses in the range 1.2-2.2 M_S. Until recently, all known ACs were pure single-mode pulsator…
Additional Galactic Cepheids from the OGLE Survey
I. Soszyński, A. Udalski, M. K. Szymański +11
We report on the results of a comprehensive search for Cepheid variable stars in the fields photometricallymonitored by the OGLE Galaxy Variability Survey. We identify 742 Cepheids…
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…
Properties of the Milky Way's Old Populations Based on Photometric Metallicities of the OGLE RR Lyrae Stars
P. Pietrukowicz, A. Udalski, I. Soszynski +11
We have used photometric data on almost 91 000 fundamental-mode RR Lyrae stars (type RRab) detected by the OGLE survey to investigate properties of old populations in the Milky Way…
OGLE-2018-BLG-1269Lb: A Jovian Planet With A Bright, Host
Youn Kil Jung, Andrew Gould, Andrzej Udalski +54
We report the discovery of a planet in the microlensing event OGLE-2018-BLG-1269, with planet-host mass ratio , i.e., times smaller than the Jupiter/Su…
Long photometric cycle and disk evolution in the Lyrae type binary OGLE-BLG-ECL-157529
R. E. Mennickent, J. Garcés, G. Djurašević +4
The subtype of hot algol semidetached binaries dubbed Double Periodic Variables (DPVs) are characterized by a photometric cycle longer than the orbital one, whose nature has been r…
OGLE-ing the Magellanic System: Optical Reddening Maps of the Large and Small Magellanic Cloud from Red Clump Stars
D. M. Skowron, J. Skowron, A. Udalski +12
We present the most extensive and detailed reddening maps of the Magellanic Clouds (MCs) derived from the color properties of Red Clump (RC) stars. The analysis is based on the dee…
OGLE-2017-BLG-0406: Microlens Parallax Reveals Saturn-mass Planet orbiting M-dwarf Host in the Inner Galactic Disk
Yuki Hirao, David P. Bennett, Yoon-Hyun Ryu +93
We report the discovery and analysis of the planetary microlensing event OGLE-2017-BLG-0406, which was observed both from the ground and by the satellite in a solar…
Microlensing optical depth and event rate in the OGLE-IV Galactic plane fields
Przemek Mroz, Andrzej Udalski, Michal K. Szymanski +10
Searches for gravitational microlensing events are traditionally concentrated on the central regions of the Galactic bulge but many microlensing events are expected to occur in the…
Ogle-2018-blg-0677lb: A super earth near the galactic bulge
Antonio Herrera-Martín, M. D. Albrow, A. Udalski +30
We report the analysis of the microlensing event OGLE-2018-BLG-0677. A small feature in the light curve of the event leads to the discovery that the lens is a star-planet system. A…
KMT-2019-BLG-1339L: an M Dwarf with a Giant Planet or a Companion Near the Planet/Brown Dwarf Boundary
Cheongho Han, Doeon Kim, Andrzej Udalski +31
We analyze KMT-2019-BLG-1339, a microlensing event with an obvious but incompletely resolved brief anomaly feature around the peak of the light curve. Although the origin of the an…
A free-floating or wide-orbit planet in the microlensing event OGLE-2019-BLG-0551
P. Mroz, R. Poleski, C. Han +30
High-cadence observations of the Galactic bulge by the microlensing surveys led to the discovery of a handful of extremely short-timescale microlensing events that can be attribute…
Over 78 000 RR Lyrae Stars in the Galactic Bulge and Disk from the OGLE Survey
I. Soszyński, A. Udalski, M. Wrona +11
We present an upgrade of the OGLE Collection of RR Lyrae stars in the Galactic bulge and disk. The size of our sample has been doubled and reached 78 350 RR Lyr variables, of which…
Mapping the Northern Galactic Disk Warp with Classical Cepheids
D. M. Skowron, J. Skowron, P. Mróz +11
We present an updated three dimensional map of the Milky Way based on a sample of 2431 classical Cepheid variable stars, supplemented with about 200 newly detected classical Cephei…