2026 Andrzej Udalski: Physics Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Physics	119	849	804	2	2	1421	50332

Discipline name

D-Index

World Ranking

Current World Ranking

National Ranking

Current National Ranking

Publications

Citations

Physics

119

849

804

1421

50332

Research.com Recognitions

2026 - Research.com Physics in Poland Leader Award
2025 - Research.com Physics in Poland Leader Award
2016 - Polish Academy of Science
2012 - Member of the National Academy of Sciences
2002 - Prize of the Foundation for Polish Science - Nagroda Fundacji na rzecz Nauki Polskiej for his work concerning the revision of the distance scale of the Universe and discovering many planetary low-luminosity companions to solar-type stars

Overview

Andrzej Udalski is affiliated with the University of Warsaw in Poland and has an extensive research portfolio in physics and astronomy, with a particular emphasis on astronomy and astrophysics. Over the course of their career, they have published 527 works primarily focused on the study of stellar, planetary, and galactic phenomena.

Their research covers a broad range of topics, including:

Stellar, planetary, and galactic studies
Astronomy and astrophysical research
Gamma-ray bursts and supernovae
Astrophysical phenomena and observations
Astrophysics and star formation studies
Astronomical observations and instrumentation
Astro and planetary science

Udalski's frequent publication venues reflect a strong presence in the field of astronomy and astrophysics, including prominent sources such as:

arXiv (Cornell University)
Astronomy and Astrophysics
The Astronomical Journal
Monthly Notices of the Royal Astronomical Society
The Astrophysical Journal Supplement Series

The scientist has collaborated extensively with several peers. Notable frequent co-authors include:

I. Soszyński
P. Mróz
P. Pietrukowicz
J. Skowron
S. Kozłowski

Among Udalski's recent publications are several significant papers, including:

An Isolated Mass-gap Black Hole or Neutron Star Detected with Astrometric Microlensing (2022), published in The Astrophysical Journal Letters
A classifier for spurious astrometric solutions in Gaia eDR3 (2021), published in Monthly Notices of the Royal Astronomical Society
An X-ray-quiet black hole born with a negligible kick in a massive binary within the Large Magellanic Cloud (2022), published in Nature Astronomy
No massive black holes in the Milky Way halo (2024), published in Nature
(Untitled paper by K. C. Sahu, 2022), published in Warwick Research Archive Portal (University of Warwick)

Udalski's work spans several related subfields, notably:

Astronomy and Astrophysics
Instrumentation
Computational Mechanics
Atomic and Molecular Physics, and Optics
Biomedical Engineering

The scientist's contributions have been recognized with several awards over the years. These include the Polish Academy of Science award in 2016, membership in the National Academy of Sciences since 2012, and the Prize of the Foundation for Polish Science awarded in 2002 for their work on revising the distance scale of the Universe and discovering many planetary low-luminosity companions to solar-type stars.

Best Publications

Discovery of a cool planet of 5.5 Earth masses through gravitational microlensing

J.-P. Beaulieu;D. P. Bennett;P. Fouqué;A. Williams

857
Citations
An eclipsing-binary distance to the Large Magellanic Cloud accurate to two per cent

G. Pietrzyński;G. Pietrzyński;D. Graczyk;W. Gieren;I. B. Thompson

744
Citations
One or more bound planets per Milky Way star from microlensing observations

A. Cassan;A. Cassan;D. Kubas;D. Kubas;J.-P. Beaulieu;J.-P. Beaulieu;M. Dominik;M. Dominik

692
Citations
OGLE 2003-BLG-235/MOA 2003-BLG-53: A Planetary Microlensing Event

I. A. Bond;A. Udalski;M. Jaroszyński;M. Jaroszyński;N. J. Rattenbury

595
Citations
Unbound or distant planetary mass population detected by gravitational microlensing

T. Sumi;K. Kamiya;D. P. Bennett

583
Citations
Discovery of a Jupiter/Saturn Analog with Gravitational Microlensing

B. S. Gaudi;D. P. Bennett;A. Udalski;A. Gould

520
Citations
REDDENING AND EXTINCTION TOWARD THE GALACTIC BULGE FROM OGLE-III: THE INNER MILKY WAY'S RV ∼ 2.5 EXTINCTION CURVE*

David M. Nataf;David M. Nataf;Andrew Gould;Pascal Fouqué;Pascal Fouqué;Oscar A. Gonzalez

503
Citations
V1309 Scorpii: merger of a contact binary

R. Tylenda;M. Hajduk;T. Kamiński;A. Udalski

503
Citations
OGLE-2003-BLG-262: Finite-Source Effects from a Point-Mass Lens

Jaiyul Yoo;D. L. DePoy;A. Gal-Yam;B. S. Gaudi

502
Citations
Frequency of Solar-Like Systems and of Ice and Gas Giants Beyond the Snow Line from High-Magnification Microlensing Events in 2005-2008

A. Gould;Subo Dong;B.S. Gaudi;A. Udalski

481
Citations
Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars - V. Evidence for a wide age distribution and a complex MDF

Thomas Bensby;J. C. Yee;Sofia Feltzing;J. A. Johnson

457
Citations
Quantifying Quasar Variability As Part of a General Approach To Classifying Continuously Varying Sources

Szymon Kozlowski;Christopher S. Kochanek;A. Udalski;L. Wyrzykowski;L. Wyrzykowski

453
Citations
OGLE 2003-BLG-235/MOA 2003-BLG-53: A planetary microlensing event

I. A. Bond;A. Udalski;M. Jaroszynski;N. J. Rattenbury

432
Citations
Microlens OGLE-2005-BLG-169 Implies Cool Neptune-Like Planets are Common

A. Gould;A. Udalski;D. An;D. P. Bennett

430
Citations
IS QUASAR OPTICAL VARIABILITY A DAMPED RANDOM WALK

Ying Zu;C. S. Kochanek;Szymon Kozłowski;Andrzej Udalski

385
Citations
QUANTIFYING QUASAR VARIABILITY AS PART OF A GENERAL APPROACH TO CLASSIFYING CONTINUOUSLY VARYING SOURCES

Szymon Kozłowski;Christopher S. Kochanek;A. Udalski;Ł. Wyrzykowski;Ł. Wyrzykowski

380
Citations
Microlens OGLE-2005-BLG-169 Implies That Cool Neptune-like Planets Are Common

A. Gould;A. Udalski;D. An;D. P. Bennett

378
Citations
THE SPLIT RED CLUMP OF THE GALACTIC BULGE FROM OGLE-III

David Nataf;A Udalski;A Gould;P. Fouque

377
Citations
FREQUENCY OF SOLAR-LIKE SYSTEMS AND OF ICE AND GAS GIANTS BEYOND THE SNOW LINE FROM HIGH-MAGNIFICATION MICROLENSING EVENTS IN 2005-2008

A. Gould;Subo Dong;B. S. Gaudi;A. Udalski

369
Citations
A Jovian-Mass Planet in Microlensing Event OGLE-2005-BLG-071

A. Udalski;M. Jaroszyński;B. Paczyński;M. Kubiak

345
Citations