Kavli Affiliate: Igor V. Moskalenko
| First 5 Authors: Mikhail A. Malkov, Igor V. Moskalenko, , ,
| Summary:
Significant progress in cosmic ray (CR) studies was achieved over the past
decade. Particularly important are precise measurements of primary and
secondary species in the TV rigidity domain that show a bump in the spectra of
CR species from 0.5-50 TV. In this letter, we argue that it is likely caused by
a stellar bow- or wind-termination shock that reaccelerates preexisting CRs,
which further propagate to the Sun along the magnetic field lines. This single
universal process is responsible for the observed spectra of all CR species in
the rigidity range below 100 TV. A viable candidate is Epsilon Eridani star at
3.2 pc from the Sun, which is well-aligned with the direction of the local
magnetic field. We provide a simple formula that reproduces the spectra of all
CR species with only two nonadjustable shock parameters, uniquely derived from
the proton data. We show how our formalism predicts helium and carbon spectra
and the B/C ratio.
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