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. A journal is a periodical publication intended to further progress of science, usually by reporting new research. Most journals are highly specialized, although some of the oldest journals publish articles, reviews, editorials, short communications, letters, and scientific papers across a wide range of scientific fields. Journals contain articles that peer reviewed, in an attempt to ensure that articles meet the journal's standards of quality, and scientific validity. Each such journal article becomes part of the permanent scientific record.

Citations are important for a journal to get impact factor. Impact factor is a measure reflecting the average number of citations to recent articles published in the journal. The impact of the journal is influenced by impact factor, the journals with high impact factor are considered more important than those with lower ones. To increase the visibility and ease of use of open access scientific and scholarly journals PrimeOA Publications top online publishing journals are indexed in different indexing and archiving services. Indexing provides easy access of the article online.