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Andrzej Udalski
Researcher at University of Warsaw
Publications - 1133
Citations - 42025
Andrzej Udalski is an academic researcher from University of Warsaw. The author has contributed to research in topics: Gravitational microlensing & Stars. The author has an hindex of 98, co-authored 1091 publications receiving 39349 citations. Previous affiliations of Andrzej Udalski include Ohio State University & Chungbuk National University.
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Journal ArticleDOI
An eclipsing-binary distance to the Large Magellanic Cloud accurate to two per cent
Grzegorz Pietrzyński,Grzegorz Pietrzyński,Dariusz Graczyk,Wolfgang Gieren,Ian B. Thompson,Bogumił Pilecki,Bogumił Pilecki,Andrzej Udalski,Igor Soszyński,Szymon Kozłowski,Piotr Konorski,Ksenia Suchomska,Giuseppe Bono,Giuseppe Bono,P. G. Prada Moroni,Sandro Villanova,Nicolas Nardetto,F. Bresolin,R. P. Kudritzki,Jesper Storm,Alexandre Gallenne,Radosław Smolec,Dante Minniti,M. Kubiak,Michał K. Szymański,Radosław Poleski,Radosław Poleski,Łukasz Wyrzykowski,Krzysztof Ulaczyk,P. Pietrukowicz,Marek Górski,Paulina Karczmarek +31 more
TL;DR: Determinations of the distances to eight long-period, late-type eclipsing systems in the Large Magellanic Cloud, composed of cool, giant stars, provide a firm base for a 3-per-cent determination of the Hubble constant.
Journal ArticleDOI
Discovery of a cool planet of 5.5 Earth masses through gravitational microlensing
J. P. Beaulieu,David P. Bennett,Pascal Fouqué,Andrew Williams,Martin Dominik,U. G. Jørgensen,D. Kubas,Arnaud Cassan,C. Coutures,J. G. Greenhill,K. M. Hill,J. W. Menzies,Penny D. Sackett,Michael D. Albrow,S. Brillant,J. A. R. Caldwell,J. J. Calitz,K. H. Cook,E. Corrales,M. Desort,S. Dieters,D. Dominis,J. Donatowicz,M. Hoffman,Stephen R. Kane,J. B. Marquette,R. M. Martin,P. J. Meintjes,K. R. Pollard,Kailash C. Sahu,C. Vinter,Joachim Wambsganss,K. Woller,Keith Horne,Iain A. Steele,D. M. Bramich,D. M. Bramich,Martin Burgdorf,Colin Snodgrass,M. F. Bode,Andrzej Udalski,Michał K. Szymański,M. Kubiak,T. Wiȩckowski,Grzegorz Pietrzyński,Igor Soszyński,O. Szewczyk,Łukasz Wyrzykowski,Bohdan Paczynski,Fumio Abe,Ian A. Bond,T. R. Britton,T. R. Britton,A. C. Gilmore,John B. Hearnshaw,Yoshitaka Itow,Kisaku Kamiya,P. M. Kilmartin,A. V. Korpela,Kimiaki Masuda,Yutaka Matsubara,M. Motomura,Yasushi Muraki,Shota Nakamura,C. Okada,Kouji Ohnishi,Nicholas J. Rattenbury,Takashi Sako,Susumu Sato,Misao Sasaki,T. Sekiguchi,Denis J. Sullivan,P. J. Tristram,Philip Yock,T. Yoshioka +74 more
TL;DR: The detection of a cool, sub-Neptune-mass planets may be more common than gas giant planets, as predicted by the core accretion theory, and is suggested to name OGLE-2005-BLG-390Lb, indicating a planetary mass companion to the lens star of the microlensing event.
Journal ArticleDOI
One or more bound planets per Milky Way star from microlensing observations
Arnaud Cassan,Arnaud Cassan,D. Kubas,D. Kubas,J. P. Beaulieu,J. P. Beaulieu,Martin Dominik,Martin Dominik,Keith Horne,Keith Horne,J. G. Greenhill,J. G. Greenhill,Joachim Wambsganss,Joachim Wambsganss,J. W. Menzies,Andrew Williams,U. G. Jørgensen,U. G. Jørgensen,Andrzej Udalski,David P. Bennett,David P. Bennett,Michael D. Albrow,Michael D. Albrow,V. Batista,S. Brillant,S. Brillant,J. A. R. Caldwell,J. A. R. Caldwell,Andrew A. Cole,Andrew A. Cole,Ch. Coutures,K. H. Cook,K. H. Cook,S. Dieters,S. Dieters,D. Dominis Prester,D. Dominis Prester,J. Donatowicz,J. Donatowicz,Pascal Fouqué,Pascal Fouqué,K. Hill,K. Hill,N. Kains,N. Kains,Stephen R. Kane,Stephen R. Kane,J. B. Marquette,R. Martin,K. R. Pollard,K. R. Pollard,Kailash C. Sahu,Kailash C. Sahu,C. Vinter,C. Vinter,D. Warren,D. Warren,B. Watson,B. Watson,M. Zub,M. Zub,Takahiro Sumi,Michał K. Szymański,M. Kubiak,Radosław Poleski,Igor Soszyński,Krzysztof Ulaczyk,Grzegorz Pietrzyński,Grzegorz Pietrzyński,Łukasz Wyrzykowski,Łukasz Wyrzykowski +70 more
TL;DR: It is concluded that stars are orbited by planets as a rule, rather than the exception, and that of stars host Jupiter-mass planets 0.5–10 au (Sun–Earth distance) from their stars.
Journal ArticleDOI
Unbound or distant planetary mass population detected by gravitational microlensing
Takahiro Sumi,Kisaku Kamiya,David P. Bennett,Ian A. Bond,Fumio Abe,C. S. Botzler,Akihiko Fukui,K. Furusawa,John B. Hearnshaw,Yoshitaka Itow,P. M. Kilmartin,A. V. Korpela,W. Lin,C. H. Ling,Kimiaki Masuda,Yutaka Matsubara,N. Miyake,M. Motomura,Yasushi Muraki,M. Nagaya,Shota Nakamura,Kouji Ohnishi,Teppei Okumura,Y. C. Perrott,Nicholas J. Rattenbury,To. Saito,T. K. Sako,Denis J. Sullivan,Winston L. Sweatman,P. J. Tristram,P. C. M. Yock,Andrzej Udalski,Michał K. Szymański,M. Kubiak,Grzegorz Pietrzyński,Radosław Poleski,Igor Soszyński,Łukasz Wyrzykowski,K. Ulaczyk +38 more
TL;DR: The discovery of a population of unbound or distant Jupiter-mass objects is reported, which are almost twice as common as main-sequence stars, based on two years of gravitational microlensing survey observations towards the Galactic Bulge.
Journal ArticleDOI
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,Jennifer A. Johnson,Jan Skowron,Andrzej Udalski,Michał K. Szymański,M. Kubiak,Grzegorz Pietrzyński,Grzegorz Pietrzyński,Igor Soszyński,Krzysztof Ulaczyk,Łukasz Wyrzykowski,Łukasz Wyrzykowski,Radosław Poleski +17 more
TL;DR: In this article, the authors combine VI photometry from OGLE-III with VISTA Variables in The Via Lactea survey and Two Micron All Sky Survey measurements of E(J? Ks ) to resolve the longstanding problem of the non-standard optical extinction toward the Galactic bulge.