Antimatter bounds from antiasteroid annihilation in collisions with planets and Sun

The existence of antimatter stars in the Galaxy as possible signature for inflationary models with nonhomogeneous baryogenesis may leave the trace by antimatter cosmic rays as well as by their secondaries (antiplanets and antimeteorites) diffused bodies in our galactic halo. The antimeteorite flux may leave its explosive gamma signature by colliding on lunar soil as well as on terrestrial, jovian and solar atmospheres. However the propagation in Galaxy and the consequent evaporation in galactic matter gas suppress the lightest (m<10−2 g) antimeteorites. Nevertheless heaviest antimeteorites (m>10−1 g up to 106 g) are unable to be deflected or annihilate by the thin galactic gas surface annihilation; they might hit the Sun (or rarely Jupiter) leading to an explosive gamma event and a spectacular track with a bouncing and even a propelling annihilation on cromosphere and photosphere. Their antinuclei annihilation in pions and their final hard gammas showering may be observable as a “solar flare” at a rate nearly comparable to the observed ones. From their absence we may infer first bounds on antimatter–matter ratio near or below 10−9 limit applying already recorded data in gamma BATSE catalog.