T
Takahiro Sumi
Researcher at Osaka University
Publications - 453
Citations - 23432
Takahiro Sumi is an academic researcher from Osaka University. The author has contributed to research in topics: Gravitational microlensing & Planet. The author has an hindex of 73, co-authored 424 publications receiving 21863 citations. Previous affiliations of Takahiro Sumi include Max Planck Society & Nagoya University.
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Journal ArticleDOI
The Milky Way Tomography with SDSS. I. Stellar Number Density Distribution
Mario Juric,Mario Juric,Željko Ivezić,Alyson Brooks,Robert H. Lupton,David J. Schlegel,David J. Schlegel,Douglas P. Finkbeiner,Douglas P. Finkbeiner,Nikhil Padmanabhan,Nikhil Padmanabhan,Nicholas A. Bond,Branimir Sesar,Constance M. Rockosi,Constance M. Rockosi,Gillian R. Knapp,James E. Gunn,Takahiro Sumi,Takahiro Sumi,Donald P. Schneider,J. C. Barentine,Howard Brewington,J. Brinkmann,Masataka Fukugita,Michael Harvanek,S. J. Kleinman,Jurek Krzesinski,Jurek Krzesinski,Dan Long,Eric H. Neilsen,Atsuko Nitta,Stephanie A. Snedden,Donald G. York +32 more
TL;DR: In this paper, the authors used the photometric parallax method to estimate the distances to ~48 million stars detected by the Sloan Digital Sky Survey (SDSS) and map their three-dimensional number density distribution in the Galaxy.
Journal ArticleDOI
The Milky Way Tomography with SDSS: I. Stellar Number Density Distribution
Mario Juric,Zeljko Ivezic,Alyson Brooks,Robert H. Lupton,David J. Schlegel,Douglas P. Finkbeiner,Nikhil Padmanabhan,Nicholas A. Bond,Branimir Sesar,Constance M. Rockosi,Gillian R. Knapp,James E. Gunn,Takahiro Sumi,Donald P. Schneider,J. C. Barentine,Howard Brewington,J. Brinkmann,Masataka Fukugita,Michael Harvanek,S. J. Kleinman,Jurek Krzesinski,Dan Long,Eric H. Neilsen,Atsuko Nitta,Stephanie A. Snedden,Donald G. York +25 more
TL;DR: In this article, the authors estimate the distances to ~48 million stars detected by the Sloan Digital Sky Survey and map their 3D number density distribution in 100 1000deg^2 of sky towards the constellation of Virgo, at distances of ~6-20 kpc.
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
Real-time difference imaging analysis of moa galactic bulge observations during 2000
Ian A. Bond,Ian A. Bond,Fumio Abe,R. J. Dodd,R. J. Dodd,R. J. Dodd,John B. Hearnshaw,Morihiro Honda,Jun Jugaku,P. M. Kilmartin,P. M. Kilmartin,A. Marles,Kimiaki Masuda,Yutaka Matsubara,Yasushi Muraki,Takashi Nakamura,G. Nankivell,S. Noda,C. Noguchi,Kouji Ohnishi,Nicholas J. Rattenbury,M. Reid,To. Saito,Hiroshi Sato,Maki Sekiguchi,J. Skuljan,D. J. Sullivan,Takahiro Sumi,Mine Takeuti,Yoshiyuki Watase,S. Wilkinson,R. Yamada,T. Yanagisawa,Philip Yock +33 more
TL;DR: In this paper, the authors describe observations carried out by the MOA group of the Galactic bulge during 2000 that were designed to detect efficiently gravitational microlensing of faint stars in which the magnification is high and/or of short duration.