Astroparticle physics, also called particle astrophysics, is a branch of particle physics that studies elementary particles of astronomical origin and their relation to astrophysics and cosmology. Using experimental methods known from cosmic ray and particle physics, astroparticle physics investigates processes of the highest energies taking place in the universe. Astroparticle physics is a branch of science that studies elementary particles of astronomical origin and its relation with cosmology and astrophysics. It is a new field with upcoming research in astronomy, detector physics, cosmology, astrophysics and particle physics. Astroparticle physics has led to the development of new detection methods to observe cosmic particles including gamma rays, neutrinos and cosmic rays at the highest energy. The top journals are peer reviewed scholarly journals. These provide high quality, meticulously reviewed and rapid publication, to cater the insistent need of scientific community. These journals are indexed with all their citations noted.