Giant Stellar Arcs as the imprint of Precessing Gamma Jets by Gamma-Ray Bursts

Precessing Gamma Jets, originated by Neutron Stars or Black Holes, may blaze to the observer leading to Gamma Bursts (GRBs) and Soft Gamma repeaters (SGRs). The thin gamma jet is born either at Supernova (SN) like events mostly at the cosmological distances, like GRB, or at nearer accreting binary system, like SGRs. The collimated gamma jet Comptonized by the ultrarelativistic inner electron pairs jets (hitting thermal photos) spins (because of the pulsar) and precedes (because of a companion or accreating disk) in helical and spiral nebular shapes. Its cumulative spray may eject and sweep gas creating nebular rings and plerions and, after long time, partiall HI supershells. Their consequent gravitational fragmentation may lead to characteristic star formation in giant arcs, which might be just the relic imprints of the earliest peaked GRBs and the late steady SGRs precesing jet emissions. Relic stellar rings and arcs may inform, by present morphology on the jet binary eccentricity and its time evolution. Their lifetime and occurrence may probe the Supernova-GRB connection.