Conveners
Neutrino-Gamma connection & The Sun
- Elena Orlando (Stanford University)
The Fermi Large Area Telescope (LAT) observations of the active Sun provide the largest sample of detected solar flares with emission greater than 30 MeV to date. These include detections of impulsive and sustained emission, extending up to ~20 hours in the case of the 2012 March 7 X-class flares. Of particular interest is the first detection of >100 MeV gamma-ray emission from three solar...
Solar flare neutrinos from the decay of mesons produced in collisions of accelerated ions from the solar atmosphere are expected with energies of O(MeV-Gev). The study of such neutrinos, combined with existing gamma-ray observations by Fermi-LAT, would provide a novel window to the underlying physics of the acceleration process. The IceCube Neutrino Observatory may be sensitive to solar flare...
I discuss the results of IceCube's astrophysical neutrino observations in the context of Fermi data. Examples are constraints on the contribution to the observed diffuse neutrino flux from AGNs and GRBs from stacking analyses using catalogues, and generic conclusions about the neutrino production mechanism from Fermi's extragalactic diffuse flux measurements. I will also point out theoretical...
I discuss attempts to explain in a unified way the experimental data on ultrahigh energy neutrinos and cosmic rays, using a single source class and obeying data on cosmic ray composition and limits on the extragalactic diffuse gamma-ray background.
High-confidence associations of individual neutrinos with individual blazars could be achieved via spatially and temporally coincident detections of photons and high-energy neutrinos (>100 TeV) from short blazar flares. It has been suggested that the current IceCube neutrino detector is sufficiently sensitive to detect neutrinos from such short flares.
We want to test this prediction by...
The Sun in its quiescent state is a known gamma-ray source. The solar emission is produced by Cosmic Rays (CRs) penetrating the inner heliosphere and interacting with the solar atmosphere and optical photons. The solar emission is characterized by two spatially and spectrally distinct components: (i) the disk emission due to hadronic CR cascades in the solar atmosphere, and (ii) the spatially...
