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A

A. Udalski

Eberhard Karls University of Tubingen

72H-index
1.2KPaper Count
2.2WCitation Count
Published Papers 400
Publication Date
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An Orbit for a Massive Wolf–Rayet Binary in the LMC: An Example of Binary Evolution*
errThe Astrophysical Journal
IF0
err2026-04-08
err0
errOAAI
errBreelyn Cocke; Philip Massey; Nidia I. Morrell; Laura R. Penny; Kathryn F. Neugent; Jan J. Eldridge; Michał K. Szymański; Andrzej Udalski; Laurella C. Marin
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Mass Production of 2023 KMTNet Microlensing Planets. I. Low Mass Ratio
errThe Astronomical Journal
IF0
err2026-04-01
err0
errOAAI
errYoon-Hyun Ryu; Andrzej Udalski; Hongjing Yang; Kyu-Ha Hwang; Weicheng Zang; Yang Huang; Andrew Gould; Michael D. Albrow; Ping Chen; Sun-Ju Chung; Subo Dong; Cheongho Han; Youn Kil Jung; In-Gu Shin; Yossi Shvartzvald; Jennifer C. Yee; Sang-Mok Cha; Dong-Jin Kim; Seung-Lee Kim; Chung-Uk Lee; Dong-Joo Lee; Yongseok Lee; Byeong-Gon Park; Richard W. Pogge; Przemek Mróz; Radosław Poleski; Jan Skowron; Michał K. Szymański; Igor Soszyński; Paweł Pietrukowicz; Szymon Kozłowski; Krzysztof Ulaczyk; Krzysztof A. Rybicki; Patryk Iwanek; Marcin Wrona; Mariusz Gromadzki; Mateusz J. Mróz
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Broad-band study of the Be/X-ray binary pulsar eRASSU J012422.9-724248 in the Magellanic Bridge, near the eastern wing of the Small Magellanic Cloud
errMonthly Notices of the Royal Astronomical Society
IF4.8
err2026-03-01
err0
PREAI
errYang, Haonan; Maitra, Chandreyee; Haberl, Frank; Kaltenbrunner, David; Ducci, Lorenzo; Udalski, Andrzej; Vasilopoulos, Georgios
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The dramatic transition of the extreme red supergiant WOH G64 to a yellow hypergiant
errNature Astronomy
IF14.3
err2026-02-23
err0
PREAI
errGonzalo Muñoz-Sanchez; Maria Kalitsounaki; Stephan de Wit; Konstantinos Antoniadis; Alceste Zoe Bonanos; Emmanouil Zapartas; Konstantina Boutsia; Evangelia Christodoulou; Grigoris Maravelias; Igor Soszyński; Andrzej Udalski
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Identification of new Galactic symbiotic stars with SALT-II. New discoveries and characterization of the sample
errMonthly Notices of the Royal Astronomical Society
IF4.8
err2026-02-01
err1
errOAAI
errMerc, J.; Mikolajewska, J.; Ilkiewicz, K.; Monard, B.; Udalski, A.
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A free-floating-planet microlensing event caused by a Saturn-mass object
errScience
IF45.8
err2026-01-01
err0
PREAI
errSubo Dong; Zexuan Wu; Yoon-Hyun Ryu; Andrzej Udalski; Przemek Mróz; Krzysztof A. Rybicki; Simon T. Hodgkin; Łukasz Wyrzykowski; Laurent Eyer; Thomas Bensby; Ping Chen; Sharon X. Wang; Andrew Gould; Hongjing Yang; Michael D. Albrow; Sun-Ju Chung; Cheongho Han; Kyu-Ha Hwang; Youn Kil Jung; In-Gu Shin; Yossi Shvartzvald; Jennifer C. Yee; Weicheng Zang; Dong-Jin Kim; Chung-Uk Lee; Byeong-Gon Park; Radosław Poleski; Jan Skowron; Michał K. Szymański; Igor Soszyński; Paweł Pietrukowicz; Szymon Kozłowski; Dorota M. Skowron; Krzysztof Ulaczyk; Mariusz Gromadzki; Milena Ratajczak; Patryk Iwanek; Marcin Wrona; Mateusz J. Mróz; Guy Rixon; Diana L. Harrison; Elmé Breedt
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KMT-2022-BLG-1818Lb; c: A Cold Super-Jupiter with a Saturn Sibling
errThe Astronomical Journal
IF0
err2025-12-17
err0
errOAAI
errHongyu Li; Jiyuan Zhang; Cheongho Han; Weicheng Zang; Youn Kil Jung; Andrzej Udalski; Takahiro Sumi; Hongjing Yang; Renkun Kuang; Shude Mao; (Leading Authors); Michael D. Albrow; Sun-Ju Chung; Andrew Gould; Kyu- Ha Hwang; Yoon-Hyun Ryu; In-Gu Shin; Yossi Shvartzvald; Jennifer C. Yee; Sang-Mok Cha; Dong-Jin Kim; Seung-Lee Kim; Chung-Uk Lee; Dong-Joo Lee; Yongseok Lee; Byeong-Gon Park; Richard W. Pogge; (The KMTNet Collaboration); Berto Monard; Yunyi Tang; Subo Dong; Zhuokai Liu; Grant Christie; Jennie McCormick; Tim Natusch; Qiyue Qian; Dan Maoz; Wei Zhu; (The MAP and µFUN Follow-up Team); Przemek Mróz; Michał K. Szymański; Jan Skowron; Radoslaw Poleski; Igor Soszyński; Paweł Pietrukowicz; Szymon Kozłowski; Krzysztof A. Rybicki; Patryk Iwanek; Krzysztof Ulaczyk; Marcin Wrona; Mariusz Gromadzki; Mateusz J. Mróz; (The OGLE Collaboration); Fumio Abe; Ken Bando; David P. Bennett; Aparna Bhattacharya; Ian A. Bond; Akihiko Fukui; Ryusei Hamada; Shunya Hamada; Naoto Hamasak; Yuki Hirao; Stela Ishitani Silva; Naoki Koshimoto; Yutaka Matsubara; Shota Miyazaki; Yasushi Muraki; Tutumi Nagai; Kansuke Nunota; Greg Olmschenk; Clément Ranc; Nicholas J. Rattenbury; Yuki Satoh; Daisuke Suzuki; Sean Terry; Paul J. Tristram; Aikaterini Vandorou; Hibiki Yama; (The MOA Collaboration)
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Three Binary-source Binary-lens Microlensing Events from the 2024 Microlensing Campaign
errPublications of the Astronomical Society of the Pacific
IF7.7
err2025-10-03
err0
PREAI
errCheongho Han; Chung-Uk Lee; Andrzej Udalski; (Leading authors); Michael D. Albrow; Sun-Ju Chung; Andrew Gould; Youn Kil Jung; Kyu- Ha Hwang; Yoon-Hyun Ryu; Yossi Shvartzvald; In-Gu Shin; Jennifer C. Yee; Weicheng Zang; Hongjing Yang; Doeon Kim; Dong-Jin Kim; Byeong-Gon Park; (KMTNet Collaboration); Przemek Mróz; Michał K. Szymański; Jan Skowron; Radosław Poleski; Igor Soszyński; Paweł Pietrukowicz; Szymon Kozłowski; Krzysztof A. Rybicki; Patryk Iwanek; Krzysztof Ulaczyk; Marcin Wrona; Mariusz Gromadzki; Mateusz J. Mróz; (The OGLE Team)
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Microlensing Optical Depth; Event Rate; and Limits on Compact Objects in Dark Matter Based on 20 Yr of OGLE Observations of the Small Magellanic Cloud
errastrophysical journal supplement series
IF0
err2025-09-15
err0
errOAAI
errPrzemek Mróz; Andrzej Udalski; Michał K. Szymański; Igor Soszyński; Paweł Pietrukowicz; Szymon Kozłowski; Radosław Poleski; Jan Skowron; Dorota Skowron; Krzysztof Ulaczyk; Mariusz Gromadzki; Krzysztof Rybicki; Patryk Iwanek; Marcin Wrona; Milena Ratajczak
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OGLE-2014-BLG-1760: A Jupiter–Sun Analogue Residing in the Galactic Bulge
errastronomical journal
IF0
err2025-09-01
err0
errOAAI
errNatalia E. Rektsini; Clément Ranc; Naoki Koshimoto; Jean-Philippe Beaulieu; David P. Bennett; Andrew A. Cole; Sean K. Terry; Aparna Bhattacharya; Étienne Bachelet; Ian A. Bond; Andrzej Udalski; Joshua W. Blackman; Aikaterini Vandorou; Thomas J. Plunkett; Jean-Baptiste Marquette
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OGLE-2016-BLG-1195Lb: A Sub-Neptune Beyond the Snow Line of an M-dwarf Confirmed by Keck Adaptive Optics
errASTRONOMICAL JOURNAL
IF5.1
err2025-05-20
err0
errOAAI
errVandorou, Aikaterini; Dang, Lisa; Bennett, David P.; Koshimoto, Naoki; Terry, Sean K.; Udalski, Andrzej; Beaulieu, Jean-Philippe; Alard, Christophe; Bhattacharya, Aparna; Blackman, Joshua W.; Bond, Ian A.; Bouchoutrouch-Ku, Tarik; Cole, Andrew A.; Cowan, Nicolas B.; Marquette, Jean-Baptiste; Ranc, Clement; Rektsini, Natalia E.; Cetre, Sylvain; Lyke, Jim; Marin, Eduardo; Wizinowich, Peter
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Systematic Reanalysis of KMTNet Microlensing Events. II. Two New Planets in Giant-source Events
errASTRONOMICAL JOURNAL
IF5.1
err2025-05-07
err0
errOAAI
errYang, Hongjing; Yee, Jennifer C.; Zhang, Jiyuan; Lee, Chung-Uk; Kim, Dong-Jin; Bond, Ian A.; Udalski, Andrzej; Hwang, Kyu-Ha; Zang, Weicheng; Qian, Qiyue; Gould, Andrew; Mao, Shude; Albrow, Michael D.; Chung, Sun-Ju; Han, Cheongho; Jung, Youn Kil; Ryu, Yoon-Hyun; Shin, In-Gu; Shvartzvald, Yossi; Cha, Sang-Mok; Kim, Hyoun-Woo; Kim, Seung-Lee; Lee, Dong-Joo; Lee, Yongseok; Park, Byeong-Gon; Pogge, Richard W.; Abe, Fumio; Bando, Ken; Bennett, David P.; Bhattacharya, Aparna; Fukui, Akihiko; Hamada, Ryusei; Hamada, Shunya; Hamasaki, Naoto; Hirao, Yuki; Silva, Stela Ishitani; Itow, Yoshitaka; Koshimoto, Naoki; Matsubara, Yutaka; Miyazaki, Shota; Muraki, Yasushi; Nagai, Tutumi; Nunota, Kansuke; Olmschenk, Greg; Ranc, Clement; Rattenbury, Nicholas J.; Satoh, Yuki; Sumi, Takahiro; Suzuki, Daisuke; Terry, Sean K.; Tristram, Paul . J.; Vandorou, Aikaterini; Yama, Hibiki; Mroz, Przemek; Skowron, Jan; Poleski, Radoslaw; Szymanski, Michal K.; Soszynski, Igor; Pietrukowicz, Pawel; Kozlowski, Szymon; Ulaczyk, Krzysztof; Rybicki, Krzysztof A.; Iwanek, Patryk; Wrona, Marcin
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Asteroseismology of Long-period Variables with OGLE-IV Data: Using Global Seismic Parameters as Luminosity Indicators
errASTROPHYSICAL JOURNAL
IF5.4
err2025-04-28
err0
errOAAI
errXiong, Qiang; Li, Tanda; Yu, Jie; Li, Zhiwen; Bi, Shaolan; Zhang, Xianfei; Yuan, Haibo; Soszynski, I.; Udalski, A.; Szymanski, M. K.; Skowron, D. M.; Skowron, J.; Pietrukowicz, P.; Poleski, R.; Kozlowski, S.; Mroz, P.; Ulaczyk, K.; Rybicki, K.; Iwanek, P.; Wrona, M.; Gromadzki, M.; Mroz, M.
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Non-evolutionary effects on period change in Magellanic Cepheids: II. Empirical constraints on non-linear period changes
errASTRONOMY & ASTROPHYSICS
IF5.8
err2025-02-19
err0
PREAI
errRathour, Rajeev Singh; Smolec, Radoslaw; Hajdu, Gergely; Ziolkowska, Oliwia; Hocde, Vincent; Soszynski, Igor; Udalski, Andrzej; Karczmarek, Paulina
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First Resolution of Microlensed Images of a Binary-lens Event
errASTROPHYSICAL JOURNAL
IF5.4
err2024-12-17
err0
errOAAI
errWu, Zexuan; Dong, Subo; Merand, A.; Kochanek, Christopher S.; Mroz, Przemek; Shangguan, Jinyi; Christie, Grant; Tan, Thiam-Guan; Bensby, Thomas; Bland-Hawthorn, Joss; Buder, Sven; Eisenhauer, Frank; Gould, Andrew P.; Kos, Janez; Natusch, Tim; Sharma, Sanjib; Udalski, Andrzej; Woillez, J.; Buckley, David A. H.; Thompson, I. B.; El Dayem, Karim Abd; Berdeu, Anthony; Berger, Jean-Philippe; Bourdarot, Guillaume; Brandner, Wolfgang; Davies, Richard I.; Defrere, Denis; Dougados, Catherine; Drescher, Antonia; Eckart, Andreas; Fabricius, Maximilian; Feuchtgruber, Helmut; Schreiber, Natascha M. Foerster; Garcia, Paulo; Genzel, Reinhard; Gillessen, Stefan; Heissel, Gernot; Hoenig, Sebastian; Houlle, Mathis; Kervella, Pierre; Kreidberg, Laura; Lacour, Sylvestre; Lai, Olivier; Laugier, Romain; Le Bouquin, Jean-Baptiste; Leftley, James; Lopez, Bruno; Lutz, Dieter; Mang, Felix; Millour, Florentin; Montarges, Miguel; Nowacki, Hugo; Nowak, Mathias; Ott, Thomas; Paumard, Thibaut; Perraut, Karine; Perrin, Guy; Petrov, Romain; Petrucci, Pierre-Olivier; Pourre, Nicolas; Rabien, Sebastian; Ribeiro, Diogo C.; Robbe-Dubois, Sylvie; Bordoni, Matteo Sadun; Santos, Daryl; Sauter, Jonas; Scigliuto, Jules; Shimizu, Taro T.; Straubmeier, Christian; Sturm, Eckhard; Subroweit, Matthias; Sykes, Calvin; Tacconi, Linda; Vincent, Frederic; Widmann, Felix; GRAVITY Collaboration
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Millinovae: A New Class of Transient Supersoft X-Ray Sources without a Classical Nova Eruption
errASTROPHYSICAL JOURNAL LETTERS
IF11.7
err2024-12-12
err0
errOAAI
errMroz, Przemek; Krol, Krzysztof; Szegedi, Helene; Charles, Philip; Page, Kim L.; Udalski, Andrzej; Buckley, David A. H.; Dewangan, Gulab; Meintjes, Pieter; Szymanski, Michal K.; Soszynski, Igor; Pietrukowicz, Pawel; Kozlowski, Szymon; Poleski, Radoslaw; Skowron, Jan; Ulaczyk, Krzysztof; Gromadzki, Mariusz; Rybicki, Krzysztof; Iwanek, Patryk; Wrona, Marcin; Mroz, Mateusz J.
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Precise physical parameters of three late-type eclipsing binary giant stars in the Large Magellanic Cloud
errASTRONOMY & ASTROPHYSICS
IF5.8
err2024-12-03
err0
errOAAI
errGarcia, G. Rojas; Graczyk, D.; Pietrzynski, G.; Galan, C.; Gieren, W.; Thompson, I.; Suchomska, K.; Kaluszynski, M.; Soszynski, I.; Udalski, A.; Karczmarek, P.; Narloch, W.; Gorski, M.; Wielgorski, P.; Zgirski, B.; Miller, N.; Hajdu, G.; Pilecki, B.; Taormina, M.; Lewis, M.
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Dark lens candidates from Gaia Data Release 3
errASTRONOMY & ASTROPHYSICS
IF5.8
err2024-11-29
err2
errOAAI
errKruszynska, K.; Wyrzykowski, L.; Rybicki, K. A.; Howil, K.; Jablonska, M.; Kaczmarek, Z.; Ihanec, N.; Maskoliunas, M.; Bronikowski, M.; Pylypenko, U.; Udalski, A.; Mroz, P.; Poleski, R.; Skowron, J.; Szymanski, M. K.; Soszynski, I.; Pietrukowicz, P.; Kozlowski, S.; Ulaczyk, K.; Iwanek, P.; Wrona, M.; Gromadzki, M.; Mroz, M. J.; Abe, F.; Bando, K.; Barry, R.; Bennett, D. P.; Bhattacharya, A.; Bond, I. A.; Fukui, A.; Hamada, R.; Hamada, S.; Hamasaki, N.; Hirao, Y.; Ishitani Silva, S.; Itow, Y.; Koshimoto, N.; Matsubara, Y.; Miyazaki, S.; Muraki, Y.; Nagai, T.; Nunota, K.; Olmschenk, G.; Ranc, C.; Rattenbury, N. J.; Satoh, Y.; Sumi, T.; Suzuki, D.; Tristram, P. J.; Vandorou, A.; Yama, H.
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Limits on Planetary-mass Primordial Black Holes from the OGLE High-cadence Survey of the Magellanic Clouds
errASTROPHYSICAL JOURNAL LETTERS
IF11.7
err2024-11-19
err0
errOAAI
errMroz, Przemek; Udalski, Andrzej; Szymanski, Michal K.; Soszynski, Igor; Pietrukowicz, Pawel; Kozlowski, Szymon; Poleski, Radoslaw; Skowron, Jan; Ulaczyk, Krzysztof; Gromadzki, Mariusz; Rybicki, Krzysztof; Iwanek, Patryk; Wrona, Marcin; Mroz, Mateusz J.
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Microlensing brown-dwarf companions in binaries detected during the 2022 and 2023 seasons
errASTRONOMY & ASTROPHYSICS
IF5.8
err2024-11-18
err0
errOAAI
errHad, Cheongho; Bond, Ian A.; Udalski, Andrzej; Lee, Chung-Uk; Gould, Andrew; Albrow, Michael D.; Chung, Sun-Ju; Hwang, Kyu-Ha; Jung, Youn Kil; Ryu, Yoon-Hyun; Shvartzvald, Yossi; Shin, In-Gu; Yee, Jennifer C.; Yang, Hongjing; Zang, Weicheng; Cha, Sang-Mok; Kim, Doeon; Kim, Dong-Jin; Kim, Seung-Lee; Lee, Dong-Joo; Lee, Yongseok; Park, Byeong-Gon; Pogge, Richard W.; Abe, Fumio; Bando, Ken; Barry, Richard; Bennett, David P.; Bhattacharya, Aparna; Fujii, Hirosame; Fukui, Akihiko; Hamada, Ryusei; Hamada, Shunya; Hamasaki, Naoto; Hirao, Yuki; Silva, Stela Ishitani; Itow, Yoshitaka; Kirikawa, Rintaro; Koshimoto, Naoki; Matsubara, Yutaka L.; Miyazaki, Shota; Muraki, Yasushi; Nagai, Tutumi; Nunota, Kansuke; Olmschenk, Greg; Ranc, Clement; Rattenbury, Nicholas J.; Satoh, Yuki; Sumi, Takahiro; Suzuki, Daisuke; Tomoyoshi, Mio; Tristram, Paul J.; Vandorou, Aikaterini; Yama, Hibiki; Yamashita, Kansuke; Mroz, Przemek; Szymanski, Michal K.; Skowron, Jan; Poleski, Radoslaw; Soszynski, Igor; Pietrukowicz, Pawel; Kozlowski, Szymon; Rybicki, Krzysztof A.; Iwanek, Patryk; Ulaczyk, Krzysztof; Wrona, Marcin; Gromadzki, Mariusz; Mroz, Mateusz J.
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Research Directions

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Co-authors
Cooperation Journals
D
D. L. Harrison
H-index: 115 · Papers: 332
R
Richard W. Pogge
H-index: 84 · Papers: 689
Ł
Ł. Wyrzykowski
H-index: 73 · Papers: 761
P
P. Kervella
H-index: 72 · Papers: 754
D
D. P. Bennett
H-index: 70 · Papers: 545
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