Direct measurements reveal charge-dependent spectral softenings in primary cosmic rays at a common rigidity of ~15 TV, rejecting mass-dependent softening at >99.999% confidence.
Deciphering the Dipole Anisotropy of Galactic Cosmic Rays
2 Pith papers cite this work. Polarity classification is still indexing.
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abstract
Recent measurements of the dipole anisotropy in the arrival directions of Galactic cosmic rays (CRs) indicate a strong energy dependence of the dipole amplitude and phase in the TeV-PeV range. We argue here that these observations can be well understood within standard diffusion theory as a combined effect of (i) one or more local sources at Galactic longitude 120deg < l < 300deg dominating the CR gradient below 0.1-0.3 PeV, (ii) the presence of a strong ordered magnetic field in our local environment, (iii) the relative motion of the solar system, and (iv) the limited reconstruction capabilities of ground-based observatories. We show that an excellent candidate of the local CR source responsible for the dipole anisotropy at 1-100 TeV is the Vela supernova remnant.
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astro-ph.HE 2representative citing papers
An enhanced equi-zenith angle method is developed that measures cosmic-ray anisotropies over multiple time frames while determining detection efficiency directly from the data.
citing papers explorer
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Charge-dependent spectral softenings of primary cosmic-rays below the knee
Direct measurements reveal charge-dependent spectral softenings in primary cosmic rays at a common rigidity of ~15 TV, rejecting mass-dependent softening at >99.999% confidence.
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Enhanced All-Distance Equi-Zenith Angle Method for Cosmic-Ray Anisotropy Measurement
An enhanced equi-zenith angle method is developed that measures cosmic-ray anisotropies over multiple time frames while determining detection efficiency directly from the data.