NSC++: Non-Standard Cosmologies in C++

Abstract

We introduce NSC++, a header-only C++ library that simulates the evolution of the plasma and a decaying fluid in the early Universe. NSC++ can be used in C++ programs or called directly from python scripts without significant overhead. There is no special installation process or external dependencies. Furthermore, there are example programs that can be modified to handle several cases.Comment: 18 pages; 3 figures; 4 tables; The stable version of the library can be found at https://github.com/dkaramit/NSCpp/tree/stable. v2: Added reference; Minor corrections to text. v3: Minor corrections, matches published versio