2018ApJ...861L..19A

We study the propagation of cosmic rays (CRs) generated by sources residing inside superbubbles. We show that the enhanced magnetic field in the bubble wall leads to an increase in the interior CR density. Because of the large matter density in the wall, the probability for CR interactions on gas peaks there. As a result, the walls of superbubbles located near young CR sources efficiently emit neutrinos. We apply this scenario to the Loop I and Local Superbubble: these bubbles are sufficiently near such that CRs from a young source such as Vela interacting in the bubble wall can generate a substantial fraction of the observed astrophysical high-energy neutrino flux below ∼few x 100 TeV.