H
H. Y. Dai
Researcher at University of Utah
Publications - 26
Citations - 2895
H. Y. Dai is an academic researcher from University of Utah. The author has contributed to research in topics: Cosmic ray & Ultra-high-energy cosmic ray. The author has an hindex of 17, co-authored 26 publications receiving 2824 citations.
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Journal ArticleDOI
Evidence for correlated changes in the spectrum and composition of cosmic rays at extremely high energies.
D. J. Bird,S. C. Corbató,H. Y. Dai,Bruce R. Dawson,J. W. Elbert,Thomas K. Gaisser,K. D. Green,M. A. Huang,David Kieda,S. Ko,C. G. Larsen,E. C. Loh,M. Luo,M. H. Salamon,David J. Smith,Pierre Sokolsky,Paul Sommers,Todor Stanev,J. K. K. Tang,S. B. Thomas,S. Tilav +20 more
TL;DR: The Utah Fly's Eye detector has revealed a change in the cosmic ray composition which is correlated with structure in the all-particle energy spectrum, implying that the highest energy particles originate in the contemporary era of the Universe.
Journal ArticleDOI
The Cosmic ray energy spectrum observed by the Fly's Eye
D. J. Bird,S. C. Corbató,H. Y. Dai,Bruce R. Dawson,J. W. Elbert,B. L. Emerson,K. D. Green,M. A. Huang,David Kieda,M. Luo,S. Ko,C. G. Larsen,E. C. Loh,M. H. Salamon,J. D. Smith,Pierre Sokolsky,Paul Sommers,J. K. K. Tang,S. B. Thomas +18 more
Journal ArticleDOI
Detection of a Cosmic Ray with Measured Energy Well beyond the Expected Spectral Cutoff due to Cosmic Microwave Radiation
D. J. Bird,S. C. Corbató,H. Y. Dai,J. W. Elbert,K. D. Green,M. A. Huang,David Kieda,S. Ko,C. G. Larsen,E. C. Loh,M. Luo,M. H. Salamon,J. D. Smith,Pierre Sokolsky,Paul Sommers,J. K. K. Tang,S. B. Thomas +16 more
TL;DR: A 51-joule (320 +/- 90 EeV) cosmic ray was detected by the Fly's Eye air shower detector in Utah as mentioned in this paper, which is substantially greater than the energy of any previously reported cosmic ray.
Journal ArticleDOI
Measurement of the flux of ultrahigh energy cosmic rays from monocular observations by the High Resolution Fly's Eye experiment.
Rasha Abbasi,Tareq Abu-Zayyad,James F. Amann,G. Archbold,Jose A. Bellido,Konstantin Belov,John Belz,Douglas Bergman,Z. Cao,Roger W Clay,M.D. Cooper,H. Y. Dai,Bruce R. Dawson,A.A. Everett,Yu. A. Fedorova,Julien Girard,R. C. Gray,William Hanlon,C. M. Hoffman,Michael H. Holzscheiter,P. Hüntemeyer,B. F. Jones,C. C. H. Jui,David Kieda,K. Kim,M. A. Kirn,E. C. Loh,N. Manago,L. J. Marek,K. Martens,G. Martin,J. A.J. Matthews,John N. Matthews,J. R. Meyer,S. A. Moore,P. Morrison,A. N. Moosman,J.R. Mumford,M. W. Munro,C. A. Painter,L. Perera,Kevin Reil,R. Riehle,M. D. Roberts,J. S. Sarracino,Misao Sasaki,Steve Schnetzer,P. Shen,K. M. Simpson,G. Sinnis,J. D. Smith,Pierre Sokolsky,C. Song,R. W. Springer,B. T. Stokes,S. Taylor,S. B. Thomas,T.N. Thompson,Gordon Thomson,Dale Tupa,S. Westerhoff,Lawrence Wiencke,T. Vanderveen,A. Zech,Xiang Zhang +64 more
TL;DR: The cosmic ray spectrum is measured using the two air-fluorescence detectors of the High Resolution Fly's Eye observatory operating in monocular mode to fit the spectrum to a model consisting of galactic and extragalactic sources.
Journal ArticleDOI
Evidence for changing of cosmic ray composition between 10(17) and 10(18) eV from multicomponent measurements
Tareq Abu-Zayyad,Konstantin Belov,D. J. Bird,J. H. Boyer,Z. Cao,M. Catanese,G. F. Chen,Roger W Clay,Corbin Covault,J. W. Cronin,H. Y. Dai,Bruce R. Dawson,J. W. Elbert,Brian Fick,Lucy Fortson,Lucy Fortson,Joseph W. Fowler,K. Gibbs,M. A. K. Glasmacher,K. D. Green,Y. Ho,A. Huang,C. C. H. Jui,M. J. Kidd,David Kieda,B. C. Knapp,S. Ko,C. G. Larsen,Weonjong Lee,E. C. Loh,E. J. Mannel,John Matthews,John Matthews,John N. Matthews,B. J. Newport,D. Nitz,R. A. Ong,K. M. Simpson,J. D. Smith,D. Sinclair,Pierre Sokolsky,Paul Sommers,C. Song,J. K. K. Tang,S. B. Thomas,J. C. van der Velde,Lawrence Wiencke,C. R. Wilkinson,S. Yoshida,X. Z. Zhang +49 more
TL;DR: The results show that the composition is changing from a heavy to lighter mix as the energy increases, and the composition of cosmic rays with primary energies between 10(17) and 10(18) eV has been studied.