588 citations · 5.8k across the 140 of their papers we have counts for
6 papers · 1 filter
V346 Nor: the post-outburst life of a peculiar young eruptive star
Á. Kóspál, Zs. M. Szabó, P. Ábrahám +5
FU Orionis-type objects (FUors) are young low-mass stars undergoing powerful accretion outbursts. The increased accretion is often accompanied by collimated jets and energetic, lar…
KMT-2019-BLG-0842Lb: A Cold Planet Below the Uranus/Sun Mass Ratio
Youn Kil Jung, Andrzej Udalski, Weicheng Zang +59
We report the discovery of a cold planet with a very low planet/host mass ratio of , which is similar to the ratio of Uranus/Sun ($q=4.37 \times 10^…
Microlensing optical depth and event rate toward the Galactic bulge from 8 yr of OGLE-IV observations
P. Mroz, A. Udalski, J. Skowron +9
The number and properties of observed gravitational microlensing events depend on the distribution and kinematics of stars and other compact objects along the line of sight. In par…
OGLE-2018-BLG-0532Lb: Cold Neptune With Possible Jovian Sibling
Yoon-Hyun Ryu, Andrzej Udalski, Jennifer C. Yee +34
We report the discovery of the planet OGLE-2018-BLG-0532Lb, with very obvious signatures in the light curve that lead to an estimate of the planet-host mass ratio $q=M_{\rm planet}…
Type II Cepheids Pulsating in the First Overtone from the OGLE Survey
I. Soszyński, R. Smolec, A. Udalski +1
We report the discovery of the first type II Cepheids (BL Herculis stars) pulsating solely in the first overtone. We found two such objects among tens of millions of stars regularl…
A Wide Orbit Exoplanet OGLE-2012-BLG-0838Lb
Poleski R., Suzuki D., Udalski A. +48
We present the discovery of a planet on a very wide orbit in the microlensing event OGLE-2012-BLG-0838. The signal of the planet is well separated from the main peak of the event a…