1.8 MeV emission lines from galactic plane region

Abstract

The COMPTEL telescope aboard the CGRO satellite has revealed highly significant 1.8 MeV emission lines from the Galactic plane region of the Milky Way Galaxy. The observed concentrated emission region may contain a single object or superposition of multiple objects. To explain the observed emission features, an accreting neutron star has been considered as a possible source candidate. During the explosive event in the neutron star, radioactive isotopes of candidate. During the explosive event in the neutron star, radioactive isotopes of 26 AL are produced and ejected into the interstellar matter, wherein 26Alg decays emitting 1.8 MeV gamma-emission lines. The considered candidate should well explain the observed flux of the 1.8 MeV line.