All-sky Measurement of the Anisotropy of Cosmic Rays at 10 TeV and Mapping of the Local Interstellar Magnetic Field

H.E.S.S. Collaboration, IceCube Collaboration

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We present the first full-sky analysis of the cosmic ray arrival direction distribution with data collected by the High-Altitude Water Cherenkov and IceCube observatories in the northern and southern hemispheres at the same median primary particle energy of 10 TeV. The combined sky map and angular power spectrum largely eliminate biases that result from partial sky coverage and present a key to probe into the propagation properties of TeV cosmic rays through our local interstellar medium and the interaction between the interstellar and heliospheric magnetic fields. From the map, we determine the horizontal dipole components of the anisotropy δ 0h = 9.16 ×10 -4 and δ 6h = 7.25 ×10 -4 (±0.04 × 10 -4 ). In addition, we infer the direction (229.°2 ± 3.°5 R.A., 11.°4 ± 3.°0 decl.) of the interstellar magnetic field from the boundary between large-scale excess and deficit regions from which we estimate the missing corresponding vertical dipole component of the large-scale anisotropy to be δN ∼ -3.97 +1.0 -2.0 × 10 -4 .

Original languageEnglish (US)
Article number96
JournalAstrophysical Journal
Volume871
Issue number1
DOIs
StatePublished - Jan 20 2019

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interstellar magnetic fields
cosmic ray
sky
cosmic rays
anisotropy
magnetic field
dipoles
Southern Hemisphere
Northern Hemisphere
observatory
probe
high altitude
particle energy
arrivals
power spectra
observatories
energy
propagation
probes
estimates

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

@article{973c5792ff30403cb84e26c08044326d,
title = "All-sky Measurement of the Anisotropy of Cosmic Rays at 10 TeV and Mapping of the Local Interstellar Magnetic Field",
abstract = "We present the first full-sky analysis of the cosmic ray arrival direction distribution with data collected by the High-Altitude Water Cherenkov and IceCube observatories in the northern and southern hemispheres at the same median primary particle energy of 10 TeV. The combined sky map and angular power spectrum largely eliminate biases that result from partial sky coverage and present a key to probe into the propagation properties of TeV cosmic rays through our local interstellar medium and the interaction between the interstellar and heliospheric magnetic fields. From the map, we determine the horizontal dipole components of the anisotropy δ 0h = 9.16 ×10 -4 and δ 6h = 7.25 ×10 -4 (±0.04 × 10 -4 ). In addition, we infer the direction (229.°2 ± 3.°5 R.A., 11.°4 ± 3.°0 decl.) of the interstellar magnetic field from the boundary between large-scale excess and deficit regions from which we estimate the missing corresponding vertical dipole component of the large-scale anisotropy to be δN ∼ -3.97 +1.0 -2.0 × 10 -4 .",
author = "{H.E.S.S. Collaboration} and {IceCube Collaboration} and Abeysekara, {A. U.} and R. Alfaro and C. Alvarez and R. Arceo and Arteaga-Vel{\'a}zquez, {J. C.} and Rojas, {D. Avila} and E. Belmont-Moreno and Benzvi, {S. Y.} and C. Brisbois and T. Capistr{\'a}n and A. Carramiana and S. Casanova and U. Cotti and J. Cotzomi and Diaz-V{\'e}lez, {J. C.} and {De Le{\'o}n}, C. and Fuente, {E. De La} and S. Dichiara and Duvernois, {M. A.} and C. Espinoza and Fiorino, {D. W.} and H. Fleischhack and N. Fraija and A. Galv{\'a}n-G{\'a}mez and Garcia-Gonz{\'a}lez, {J. A.} and Gonz{\'a}lez, {M. M.} and Goodman, {J. A.} and Z. Hampel-Arias and Harding, {J. P.} and S. Hernandez and B. Hona and F. Hueyotl-Zahuantitla and A. Iriarte and A. Jardin-Blicq and V. Joshi and A. Lara and Vargas, {H. Le{\'o}n} and G. Luis-Raya and K. Malone and Marinelli, {S. S.} and J. Martinez-Castro and O. Martinez and Matthews, {J. A.} and P. Miranda-Romagnoli and E. Moreno and M. Mostaf{\'a} and L. Nellen and M. Newbold and Nisa, {M. U.} and R. Noriega-Papaqui",
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All-sky Measurement of the Anisotropy of Cosmic Rays at 10 TeV and Mapping of the Local Interstellar Magnetic Field. / H.E.S.S. Collaboration; IceCube Collaboration.

In: Astrophysical Journal, Vol. 871, No. 1, 96, 20.01.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - All-sky Measurement of the Anisotropy of Cosmic Rays at 10 TeV and Mapping of the Local Interstellar Magnetic Field

AU - H.E.S.S. Collaboration

AU - IceCube Collaboration

AU - Abeysekara, A. U.

AU - Alfaro, R.

AU - Alvarez, C.

AU - Arceo, R.

AU - Arteaga-Velázquez, J. C.

AU - Rojas, D. Avila

AU - Belmont-Moreno, E.

AU - Benzvi, S. Y.

AU - Brisbois, C.

AU - Capistrán, T.

AU - Carramiana, A.

AU - Casanova, S.

AU - Cotti, U.

AU - Cotzomi, J.

AU - Diaz-Vélez, J. C.

AU - De León, C.

AU - Fuente, E. De La

AU - Dichiara, S.

AU - Duvernois, M. A.

AU - Espinoza, C.

AU - Fiorino, D. W.

AU - Fleischhack, H.

AU - Fraija, N.

AU - Galván-Gámez, A.

AU - Garcia-González, J. A.

AU - González, M. M.

AU - Goodman, J. A.

AU - Hampel-Arias, Z.

AU - Harding, J. P.

AU - Hernandez, S.

AU - Hona, B.

AU - Hueyotl-Zahuantitla, F.

AU - Iriarte, A.

AU - Jardin-Blicq, A.

AU - Joshi, V.

AU - Lara, A.

AU - Vargas, H. León

AU - Luis-Raya, G.

AU - Malone, K.

AU - Marinelli, S. S.

AU - Martinez-Castro, J.

AU - Martinez, O.

AU - Matthews, J. A.

AU - Miranda-Romagnoli, P.

AU - Moreno, E.

AU - Mostafá, M.

AU - Nellen, L.

AU - Newbold, M.

AU - Nisa, M. U.

AU - Noriega-Papaqui, R.

PY - 2019/1/20

Y1 - 2019/1/20

N2 - We present the first full-sky analysis of the cosmic ray arrival direction distribution with data collected by the High-Altitude Water Cherenkov and IceCube observatories in the northern and southern hemispheres at the same median primary particle energy of 10 TeV. The combined sky map and angular power spectrum largely eliminate biases that result from partial sky coverage and present a key to probe into the propagation properties of TeV cosmic rays through our local interstellar medium and the interaction between the interstellar and heliospheric magnetic fields. From the map, we determine the horizontal dipole components of the anisotropy δ 0h = 9.16 ×10 -4 and δ 6h = 7.25 ×10 -4 (±0.04 × 10 -4 ). In addition, we infer the direction (229.°2 ± 3.°5 R.A., 11.°4 ± 3.°0 decl.) of the interstellar magnetic field from the boundary between large-scale excess and deficit regions from which we estimate the missing corresponding vertical dipole component of the large-scale anisotropy to be δN ∼ -3.97 +1.0 -2.0 × 10 -4 .

AB - We present the first full-sky analysis of the cosmic ray arrival direction distribution with data collected by the High-Altitude Water Cherenkov and IceCube observatories in the northern and southern hemispheres at the same median primary particle energy of 10 TeV. The combined sky map and angular power spectrum largely eliminate biases that result from partial sky coverage and present a key to probe into the propagation properties of TeV cosmic rays through our local interstellar medium and the interaction between the interstellar and heliospheric magnetic fields. From the map, we determine the horizontal dipole components of the anisotropy δ 0h = 9.16 ×10 -4 and δ 6h = 7.25 ×10 -4 (±0.04 × 10 -4 ). In addition, we infer the direction (229.°2 ± 3.°5 R.A., 11.°4 ± 3.°0 decl.) of the interstellar magnetic field from the boundary between large-scale excess and deficit regions from which we estimate the missing corresponding vertical dipole component of the large-scale anisotropy to be δN ∼ -3.97 +1.0 -2.0 × 10 -4 .

UR - http://www.scopus.com/inward/record.url?scp=85062044113&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85062044113&partnerID=8YFLogxK

U2 - 10.3847/1538-4357/aaf5cc

DO - 10.3847/1538-4357/aaf5cc

M3 - Article

AN - SCOPUS:85062044113

VL - 871

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1

M1 - 96

ER -