Analysis of large-scale anisotropy of ultra-high energy cosmic rays in hires data

R. U. Abbasi; T. Abu-Zayyad; M. Allen; J. F. Amann; G. Archbold; K. Belov; J. W. Belz; D. R. Bergman; S. A. Blake; O. A. Brusova; G. W. Burt; C. Cannon; Z. Cao; W. Deng; Y. Fedorova; J. Findlay; C. B. Finley; R. C. Gray; W. F. Hanlon; C. M. Hoffman; M. H. Holzscheiter; G. Hughes; P. Hüntemeyer; D. Ivanov; B. F. Jones; C. C.H. Jui; K. Kim; M. A. Kirn; H. Koers; E. C. Loh; M. M. Maestas; N. Manago; L. J. Marek; K. Martens; J. A.J. Matthews; J. N. Matthews; S. A. Moore; A. O'Neill; C. A. Painter; L. Perera; K. Reil; R. Riehle; M. D. Roberts; D. Rodriguez; M. Sasaki; S. R. Schnetzer; L. M. Scott; G. Sinnis; J. D. Smith; P. Sokolsky; C. Song; R. W. Springer; B. T. Stokes; S. R. Stratton; J. R. Thomas; S. B. Thomas; G. B. Thomson; P. Tinyakov; D. Tupa; L. R. Wiencke; A. Zech; X. Zhang

doi:10.1088/2041-8205/713/1/L64

Analysis of large-scale anisotropy of ultra-high energy cosmic rays in hires data

R. U. Abbasi
, T. Abu-Zayyad
, M. Allen
, J. F. Amann
, G. Archbold
, K. Belov
, J. W. Belz
, D. R. Bergman
, S. A. Blake
, O. A. Brusova
, G. W. Burt
, C. Cannon
, Z. Cao
, W. Deng
, Y. Fedorova
, J. Findlay
, C. B. Finley
, R. C. Gray
, W. F. Hanlon
, C. M. Hoffman

M. H. Holzscheiter, G. Hughes, P. Hüntemeyer, D. Ivanov, B. F. Jones, C. C.H. Jui, K. Kim, M. A. Kirn, H. Koers, E. C. Loh, M. M. Maestas, N. Manago, L. J. Marek, K. Martens, J. A.J. Matthews, J. N. Matthews, S. A. Moore, A. O'Neill, C. A. Painter, L. Perera, K. Reil, R. Riehle, M. D. Roberts, D. Rodriguez, M. Sasaki, S. R. Schnetzer, L. M. Scott, G. Sinnis, J. D. Smith, P. Sokolsky, C. Song, R. W. Springer, B. T. Stokes, S. R. Stratton, J. R. Thomas, S. B. Thomas, G. B. Thomson, P. Tinyakov, D. Tupa, L. R. Wiencke, A. Zech, X. Zhang

School of Arts and Sciences, New High Energy Theory Center

Rutgers, The State University

Research output: Contribution to journal › Article › peer-review

49 Scopus citations

Abstract

Stereo data collected by the HiRes experiment over a six-year period are examined for large-scale anisotropy related to the inhomogeneous distribution of matter in the nearby universe. We consider the generic case of small cosmic-ray deflections and a large number of sources tracing the matter distribution. In this matter tracer model the expected cosmic-ray flux depends essentially on a single free parameter, the typical deflection angle θ_s. We find that the HiRes data with threshold energies of 40 EeV and 57 EeV are incompatible with the matter tracer model at a 95% confidence level unless θ_s > 10° and are compatible with an isotropic flux. The data set above 10 EeV is compatible with both the matter tracer model and an isotropic flux.

Original language	American English
Pages (from-to)	L64-L68
Journal	Astrophysical Journal Letters
Volume	713
Issue number	1 PART 2
DOIs	https://doi.org/10.1088/2041-8205/713/1/L64
State	Published - 2010

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Cosmic rays
Large-scale structure of universe
Magnetic fields

Access to Document

10.1088/2041-8205/713/1/L64

Cite this

Abbasi, R. U., Abu-Zayyad, T., Allen, M., Amann, J. F., Archbold, G., Belov, K., Belz, J. W., Bergman, D. R., Blake, S. A., Brusova, O. A., Burt, G. W., Cannon, C., Cao, Z., Deng, W., Fedorova, Y., Findlay, J., Finley, C. B., Gray, R. C., Hanlon, W. F., ... Zhang, X. (2010). Analysis of large-scale anisotropy of ultra-high energy cosmic rays in hires data. Astrophysical Journal Letters, 713(1 PART 2), L64-L68. https://doi.org/10.1088/2041-8205/713/1/L64

@article{924223292dc146378b7ccf3c92a1f38e,

title = "Analysis of large-scale anisotropy of ultra-high energy cosmic rays in hires data",

abstract = "Stereo data collected by the HiRes experiment over a six-year period are examined for large-scale anisotropy related to the inhomogeneous distribution of matter in the nearby universe. We consider the generic case of small cosmic-ray deflections and a large number of sources tracing the matter distribution. In this matter tracer model the expected cosmic-ray flux depends essentially on a single free parameter, the typical deflection angle θs. We find that the HiRes data with threshold energies of 40 EeV and 57 EeV are incompatible with the matter tracer model at a 95\% confidence level unless θs > 10° and are compatible with an isotropic flux. The data set above 10 EeV is compatible with both the matter tracer model and an isotropic flux.",

keywords = "Cosmic rays, Large-scale structure of universe, Magnetic fields",

author = "Abbasi, \{R. U.\} and T. Abu-Zayyad and M. Allen and Amann, \{J. F.\} and G. Archbold and K. Belov and Belz, \{J. W.\} and Bergman, \{D. R.\} and Blake, \{S. A.\} and Brusova, \{O. A.\} and Burt, \{G. W.\} and C. Cannon and Z. Cao and W. Deng and Y. Fedorova and J. Findlay and Finley, \{C. B.\} and Gray, \{R. C.\} and Hanlon, \{W. F.\} and Hoffman, \{C. M.\} and Holzscheiter, \{M. H.\} and G. Hughes and P. H{\"u}ntemeyer and D. Ivanov and Jones, \{B. F.\} and Jui, \{C. C.H.\} and K. Kim and Kirn, \{M. A.\} and H. Koers and Loh, \{E. C.\} and Maestas, \{M. M.\} and N. Manago and Marek, \{L. J.\} and K. Martens and Matthews, \{J. A.J.\} and Matthews, \{J. N.\} and Moore, \{S. A.\} and A. O'Neill and Painter, \{C. A.\} and L. Perera and K. Reil and R. Riehle and Roberts, \{M. D.\} and D. Rodriguez and M. Sasaki and Schnetzer, \{S. R.\} and Scott, \{L. M.\} and G. Sinnis and Smith, \{J. D.\} and P. Sokolsky and C. Song and Springer, \{R. W.\} and Stokes, \{B. T.\} and Stratton, \{S. R.\} and Thomas, \{J. R.\} and Thomas, \{S. B.\} and Thomson, \{G. B.\} and P. Tinyakov and D. Tupa and Wiencke, \{L. R.\} and A. Zech and X. Zhang",

year = "2010",

doi = "10.1088/2041-8205/713/1/L64",

language = "American English",

volume = "713",

pages = "L64--L68",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "American Astronomical Society",

number = "1 PART 2",

}

Abbasi, RU, Abu-Zayyad, T, Allen, M, Amann, JF, Archbold, G, Belov, K, Belz, JW, Bergman, DR, Blake, SA, Brusova, OA, Burt, GW, Cannon, C, Cao, Z, Deng, W, Fedorova, Y, Findlay, J, Finley, CB, Gray, RC, Hanlon, WF, Hoffman, CM, Holzscheiter, MH, Hughes, G, Hüntemeyer, P, Ivanov, D, Jones, BF, Jui, CCH, Kim, K, Kirn, MA, Koers, H, Loh, EC, Maestas, MM, Manago, N, Marek, LJ, Martens, K, Matthews, JAJ, Matthews, JN, Moore, SA, O'Neill, A, Painter, CA, Perera, L, Reil, K, Riehle, R, Roberts, MD, Rodriguez, D, Sasaki, M, Schnetzer, SR, Scott, LM, Sinnis, G, Smith, JD, Sokolsky, P, Song, C, Springer, RW, Stokes, BT, Stratton, SR, Thomas, JR, Thomas, SB, Thomson, GB, Tinyakov, P, Tupa, D, Wiencke, LR, Zech, A & Zhang, X 2010, 'Analysis of large-scale anisotropy of ultra-high energy cosmic rays in hires data', Astrophysical Journal Letters, vol. 713, no. 1 PART 2, pp. L64-L68. https://doi.org/10.1088/2041-8205/713/1/L64

TY - JOUR

T1 - Analysis of large-scale anisotropy of ultra-high energy cosmic rays in hires data

AU - Abbasi, R. U.

AU - Abu-Zayyad, T.

AU - Allen, M.

AU - Amann, J. F.

AU - Archbold, G.

AU - Belov, K.

AU - Belz, J. W.

AU - Bergman, D. R.

AU - Blake, S. A.

AU - Brusova, O. A.

AU - Burt, G. W.

AU - Cannon, C.

AU - Cao, Z.

AU - Deng, W.

AU - Fedorova, Y.

AU - Findlay, J.

AU - Finley, C. B.

AU - Gray, R. C.

AU - Hanlon, W. F.

AU - Hoffman, C. M.

AU - Holzscheiter, M. H.

AU - Hughes, G.

AU - Hüntemeyer, P.

AU - Ivanov, D.

AU - Jones, B. F.

AU - Jui, C. C.H.

AU - Kim, K.

AU - Kirn, M. A.

AU - Koers, H.

AU - Loh, E. C.

AU - Maestas, M. M.

AU - Manago, N.

AU - Marek, L. J.

AU - Martens, K.

AU - Matthews, J. A.J.

AU - Matthews, J. N.

AU - Moore, S. A.

AU - O'Neill, A.

AU - Painter, C. A.

AU - Perera, L.

AU - Reil, K.

AU - Riehle, R.

AU - Roberts, M. D.

AU - Rodriguez, D.

AU - Sasaki, M.

AU - Schnetzer, S. R.

AU - Scott, L. M.

AU - Sinnis, G.

AU - Smith, J. D.

AU - Sokolsky, P.

AU - Song, C.

AU - Springer, R. W.

AU - Stokes, B. T.

AU - Stratton, S. R.

AU - Thomas, J. R.

AU - Thomas, S. B.

AU - Thomson, G. B.

AU - Tinyakov, P.

AU - Tupa, D.

AU - Wiencke, L. R.

AU - Zech, A.

AU - Zhang, X.

PY - 2010

Y1 - 2010

N2 - Stereo data collected by the HiRes experiment over a six-year period are examined for large-scale anisotropy related to the inhomogeneous distribution of matter in the nearby universe. We consider the generic case of small cosmic-ray deflections and a large number of sources tracing the matter distribution. In this matter tracer model the expected cosmic-ray flux depends essentially on a single free parameter, the typical deflection angle θs. We find that the HiRes data with threshold energies of 40 EeV and 57 EeV are incompatible with the matter tracer model at a 95% confidence level unless θs > 10° and are compatible with an isotropic flux. The data set above 10 EeV is compatible with both the matter tracer model and an isotropic flux.

AB - Stereo data collected by the HiRes experiment over a six-year period are examined for large-scale anisotropy related to the inhomogeneous distribution of matter in the nearby universe. We consider the generic case of small cosmic-ray deflections and a large number of sources tracing the matter distribution. In this matter tracer model the expected cosmic-ray flux depends essentially on a single free parameter, the typical deflection angle θs. We find that the HiRes data with threshold energies of 40 EeV and 57 EeV are incompatible with the matter tracer model at a 95% confidence level unless θs > 10° and are compatible with an isotropic flux. The data set above 10 EeV is compatible with both the matter tracer model and an isotropic flux.

KW - Cosmic rays

KW - Large-scale structure of universe

KW - Magnetic fields

UR - https://www.scopus.com/pages/publications/77950214376

UR - https://www.scopus.com/pages/publications/77950214376#tab=citedBy

U2 - 10.1088/2041-8205/713/1/L64

DO - 10.1088/2041-8205/713/1/L64

M3 - Article

SN - 2041-8205

VL - 713

SP - L64-L68

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1 PART 2

ER -

Analysis of large-scale anisotropy of ultra-high energy cosmic rays in hires data

Abstract

ASJC Scopus subject areas

Keywords

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