Neutron Stars as a Source of the Short-Lived Nuclides in Ap-star Atmospheres

We propose a new explanation of some magnetic chemically peculiar (MCP) star anomalies, which is based on an assumption that such stars be the close binary systems with a secondary component being a neutron star. Within this hypothesis one can naturally explain the main anomalous features of MCP stars: first of all, an existence of the short‐lived radioactive isotopes detected in some stars (like Przybylski's star (PS) and HR465), and some others peculiarities. Also we can assume the presence of the electron‐positron annihilation emission lines (0.511 MeV) in the gamma spectrum of some MCP stars.