S
Shoko Sakai
Researcher at University of California, Los Angeles
Publications - 166
Citations - 21445
Shoko Sakai is an academic researcher from University of California, Los Angeles. The author has contributed to research in topics: Galaxy & Cepheid variable. The author has an hindex of 63, co-authored 163 publications receiving 20445 citations. Previous affiliations of Shoko Sakai include Association of Universities for Research in Astronomy & National Science Foundation.
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Journal ArticleDOI
Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant
Wendy L. Freedman,Barry F. Madore,Barry F. Madore,Brad K. Gibson,Laura Ferrarese,Daniel D. Kelson,Shoko Sakai,Jeremy Mould,Robert C. Kennicutt,Holland C. Ford,John A. Graham,John P. Huchra,Shaun M. G. Hughes,Garth D. Illingworth,Lucas M. Macri,Peter B. Stetson +15 more
TL;DR: In this paper, the final results of the Hubble Space Telescope (HST) Key Project to measure the Hubble constant are presented, and the results are based on a Cepheid calibration of several secondary distance methods applied over the range of about 60-400 Mpc.
Journal ArticleDOI
Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant
Wendy L. Freedman,Barry F. Madore,Barry F. Madore,Brad K. Gibson,Laura Ferrarese,Daniel D. Kelson,Shoko Sakai,Jeremy Mould,Robert C. Kennicutt,Holland C. Ford,John A. Graham,John P. Huchra,Shaun M. G. Hughes,Garth D. Illingworth,Lucas M. Macri,Peter B. Stetson +15 more
TL;DR: In this article, the final results of the Hubble Space Telescope Key Project to measure the Hubble constant are presented, and the implications of these results for cosmology are discussed and compared with other, global methods for measuring the Hubble constants.
Journal ArticleDOI
The HST Key Project on the Extragalactic Distance Scale. XXVIII. Combining the Constraints on the Hubble Constant
Jeremy Mould,John P. Huchra,Wendy L. Freedman,Robert C. Kennicutt,Laura Ferrarese,Holland C. Ford,Brad K. Gibson,John A. Graham,Shaun M. G. Hughes,Garth D. Illingworth,Daniel D. Kelson,Lucas M. Macri,Barry F. Madore,Shoko Sakai,Kim Sebo,Nancy A. Silbermann,Peter B. Stetson +16 more
TL;DR: In this paper, a model of the velocity field was used to estimate the value of the Hubble constant within the range of the Tully-Fisher relation and its uncertainty, and the result is H_0 = 71 +/- 6 km/sec/Mpc. The largest contributor to this 67% confidence level result is the distance of the Large Magellanic Cloud, which has been assumed to be 50 +/- 3 kpc.
Journal ArticleDOI
The Hubble Space Telescope Key Project on the Extragalactic Distance Scale. XXVIII. Combining the Constraints on the Hubble Constant
Jeremy Mould,John P. Huchra,Wendy L. Freedman,Robert C. Kennicutt,Laura Ferrarese,Holland C. Ford,Brad K. Gibson,John A. Graham,Shaun M. G. Hughes,Garth D. Illingworth,Daniel D. Kelson,Lucas M. Macri,Barry F. Madore,Shoko Sakai,Kim Sebo,Nancy A. Silbermann,Peter B. Stetson +16 more
TL;DR: In this paper, the Tully-fisher relation, the fundamental plane of elliptical galaxies, Type Ia supernovae, and surface brightness fluctuations are combined with a model of the velocity field to yield the best available estimate of the value of H0 within the range of these secondary distance indicators and its uncertainty.
Journal ArticleDOI
COMPARISON OF Hα AND UV STAR FORMATION RATES IN THE LOCAL VOLUME: SYSTEMATIC DISCREPANCIES FOR DWARF GALAXIES
Janice C. Lee,Armando Gil de Paz,Christy Tremonti,Christy Tremonti,Robert C. Kennicutt,Robert C. Kennicutt,Samir Salim,Matt Bothwell,Daniela Calzetti,Julianne J. Dalcanton,Daniel A. Dale,Chad Engelbracht,J. G. Funes,Benjamin D. Johnson,Shoko Sakai,Evan D. Skillman,Liese van Zee,Fabian Walter,Daniel R. Weisz +18 more
TL;DR: In this paper, the authors evaluate the consistency between star formation rates (SFRs) inferred from the far ultraviolet (FUV) nonionizing continuum and Hα nebular emission.