📝 SummarXiv

Abstract

Cosmic rays reaching the atmosphere of an astrophysical object produce showers of secondary particles that may then scape into space. Here we obtain the flux of gammas and neutrinos of energy $E>10$ GeV emited by the Sun, Jupiter and Earth. We show that, while the solar magnetic field induces an albedo flux of gammas from all the points in the Sun's surface, the dipolar magnetic field in the planets implies gammas only from the very peripheral region. Neutrinos, in contrast, can cross these objects and emerge from any point in their surface. The emission from these astrophysical objects is above the diffuse flux from cosmic ray interactions with the interstellar medium and has a distinct spectrum and gamma to neutrino ratio.