G
Gregory Tarle
Researcher at University of Michigan
Publications - 60
Citations - 2017
Gregory Tarle is an academic researcher from University of Michigan. The author has contributed to research in topics: Cosmic ray & Antimatter. The author has an hindex of 19, co-authored 60 publications receiving 1962 citations. Previous affiliations of Gregory Tarle include University of Utah & Pennsylvania State University.
Papers
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Journal ArticleDOI
Measurements of the cosmic-ray positron fraction from 1 to 50 geV
S. W. Barwick,J. J. Beatty,A. Bhattacharyya,C. R. Bower,C. J. Chaput,S. Coutu,G. A. de Nolfo,G. A. de Nolfo,J. Knapp,D. M. Lowder,Shawn McKee,Dietrich Müller,J. A. Musser,S. L. Nutter,E. Schneider,S. P. Swordy,Gregory Tarle,A. D. Tomasch,E. Torbet +18 more
TL;DR: The positron fraction does not increase with energy above ≈ 10 GeV, although a small excess above purely secondary production cannot be ruled out as mentioned in this paper, which could possibly be a consequence of charge dependence in the level of solar modulation.
Journal ArticleDOI
Measurements of the Cosmic-Ray Positron Fraction From 1 to 50 GeV
S. W. Barwick,E. Schneider,J. J. Beatty,G. A. de Nolfo,A. Bhattacharyya,C. R. Bower,J. A. Musser,C. J. Chaput,S. Coutu,Shawn McKee,Gregory Tarle,A. D. Tomasch,J. Knapp,D. M. Lowder,Dietrich Müller,S. P. Swordy,E. Torbet,S. L. Nutter +17 more
TL;DR: The positron fraction does not increase with energy above ~10 GeV, although a small excess above purely secondary production cannot be ruled out as discussed by the authors, which could possibly be a consequence of charge dependence in the level of solar modulation.
Journal ArticleDOI
New Measurement of the Cosmic-Ray Positron Fraction from 5 to 15 GeV
J. J. Beatty,A. Bhattacharyya,C. R. Bower,S. Coutu,Michael DuVernois,Shawn McKee,S. Minnick,Dietrich Müller,J. A. Musser,S. L. Nutter,Allan Labrador,Michael Schubnell,S. P. Swordy,Gregory Tarle,A. D. Tomasch +14 more
TL;DR: The measurements do not support predictions of charge sign dependent solar modulation of the positron abundance at 5 GeV, and the combined data from the three HEAT flights indicate a small positron flux of nonstandard origin above 5GeV.
Journal ArticleDOI
The Energy Spectra and Relative Abundances of Electrons and Positrons in the Galactic Cosmic Radiation
Steven W. Barwick,J. J. Beatty,Charles Bower,C. J. Chaput,S. Coutu,S. Coutu,G. A. de Nolfo,Michael DuVernois,D. Ellithorpe,D. Ficenec,J. Knapp,J. Knapp,D. M. Lowder,Shawn McKee,Dietrich Müller,J. A. Musser,S. L. Nutter,S. L. Nutter,E. Schneider,S. P. Swordy,Gregory Tarle,A. D. Tomasch,E. Torbet +22 more
TL;DR: The High-Energy Antimatter Telescope (HEAT) has been used for the observation of cosmic-ray electrons and positrons from 5 GeV to about 50 GeV and of the combined "all-electron" intensity up to 100 GeV as mentioned in this paper.
Journal ArticleDOI
The Energy Spectra and Relative Abundances of Electrons and Positrons in the Galactic Cosmic Radiation
Steven W. Barwick,J. J. Beatty,Charles Bower,C. J. Chaput,S. Coutu,S. Coutu,G. A. de Nolfo,Michael DuVernois,D. Ellithorpe,D. Ficenec,J. Knapp,J. Knapp,D. M. Lowder,Shawn McKee,Dietrich Müller,J. A. Musser,S. L. Nutter,S. L. Nutter,E. Schneider,S. P. Swordy,Gregory Tarle,A. D. Tomasch,E. Torbet +22 more
TL;DR: In this article, a balloon-borne detector, HEAT (the "High-Energy Antimatter Telescope"), was used to observe the cosmic-ray electrons and positrons.