New Data from the ISʘIS instrument Suite on Parker Solar Probe

Christian, E. R.; Cohen, Christina; Cummings, A. C.; Davis, A. M.; Desai, M. I.; Nolfo, G. A. de; Giacalone, Joseph C.; Hill, M. E.; Joyce, Colin J.; Labrador, A. W.; Leske, R. A.; Matthaeus, W. H.; McComas, D. J.; McNutt, R. L.; Mewaldt, R. A.; Mitchell, D. G.; Mitchell, Jason W.; Rankin, J. S.; Roelof, E. C.; Schwadron, N. A.; Stone, E. C.; Szalay, J. R.; Wiedenbeck, M. E.

doi:10.22323/1.395.1306

Cited by 1 publication

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“…Of course, new channels and a higher precision in the channels already observed would also test it. The framework may also have implications on the data (at much lower energies) provided by the ISeIS experiment (Christian et al 2021;Malandraki et al 2022) at the Parker Solar Probe. It seems clear that the combined analysis of the five different signals that we propose would draw a more complete picture of the solar magnetism and of the propagation of CRs near the surface.…”

Section: Summary and Discussionmentioning

confidence: 99%

The Solar Disk at High Energies

Gutiérrez

Masip

Muñoz

2022

ApJ

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High energy cosmic rays illuminate the Sun and produce an image that could be observed in up to five different channels: a cosmic-ray shadow (whose energy dependence has been studied by HAWC); a gamma-ray flux (observed at E ≤ 200 GeV by Fermi-LAT); a muon shadow (detected by ANTARES and IceCube); a neutron flux (undetected, as there are no hadronic calorimeters in space); a flux of high energy neutrinos. Since these signals are correlated, the ones already observed can be used to reduce the uncertainty in the still undetected ones. Here we define a simple setup that uses the Fermi-LAT and HAWC observations to imply very definite fluxes of neutrons and neutrinos from the solar disk. In particular, we provide a fit of the neutrino flux at 10 GeV–10 TeV that includes its dependence on the zenith angle and on the period of the solar cycle. This flux represents a neutrino floor in indirect dark matter searches. We show that in some benchmark models the current bounds on the dark matter–nucleon cross section push the solar signal below this neutrino floor.

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Section: Summary and Discussionmentioning

confidence: 99%