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All-sky Measurement of the Anisotropy of Cosmic Rays at 10 TeV and Mapping of the Local Interstellar Magnetic Field
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
Vise andre og tillknytning
Rekke forfattare: 4022019 (engelsk)Inngår i: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 871, nr 1, artikkel-id 96Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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).

sted, utgiver, år, opplag, sider
2019. Vol. 871, nr 1, artikkel-id 96
Emneord [en]
astroparticle physics, cosmic rays, ISM: magnetic fields
HSV kategori
Identifikatorer
URN: urn:nbn:se:su:diva-166803DOI: 10.3847/1538-4357/aaf5ccISI: 000456837000045OAI: oai:DiVA.org:su-166803DiVA, id: diva2:1295331
Tilgjengelig fra: 2019-03-11 Laget: 2019-03-11 Sist oppdatert: 2019-03-11bibliografisk kontrollert

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Ahrens, MaryonBohm, ChristianDeoskar, KunalFinley, ChadHultqvist, KlasO'Sullivan, ErinWalck, Christian
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