Journal article
All-sky Measurement of the Anisotropy of Cosmic Rays at 10 TeV and Mapping of the Local Interstellar Magnetic Field
The Astrophysical journal, v 871(1), 96
20 Jan 2019
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 delta(0h) = 9.16 x 10(-4) and delta(6h) = 7.25 x 10(-4) (+/- 0.04 x 10(-4)). In addition, we infer the direction (229 degrees.2 +/- 3 degrees.5 R.A., 11 degrees.4 +/- 3 degrees.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 delta(N) similar to -3.97(-2.0)(+1.0) x 10(-4).
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Details
- Title
- All-sky Measurement of the Anisotropy of Cosmic Rays at 10 TeV and Mapping of the Local Interstellar Magnetic Field
- Creators
- Maryon Ahrens - Stockholm UniversityChristian Bohm - Stockholm UniversityKunal Deoskar - Stockholm UniversityChad Finley - Stockholm UniversityKlas Hultqvist - University of Alaska AnchorageErin O'Sullivan - Uppsala UniversityChristian Walck - Stockholm UniversityStephen James SclafaniIceCube Collaboration
- Publication Details
- The Astrophysical journal, v 871(1), 96
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000456837000045
- Scopus ID
- 2-s2.0-85062044113
- Other Identifier
- 991022158267604721