What data does program need?

RHM may be a powerful tool, but in a nutshell it cannot resolve the physics without an user telling the properties of the matter. These properties are usually summarized in a so-called equation of state (EoS), and are supplied to RHM as global data. Most EoS are complicated enough to not have analytic formulas, but rather to be presented as a tabulation \(P(n_b), \rho_E(n_b), ...\). An example of such tabulation (APR4, [APR98]) is to be found under presupplied/APR4/APR_EOS_Acc_Fe_RHMstandard.dat.

While all the libraries in RHM do not explicitly depend on global data, supplied to RHM, they are transferred there via RHM main programs. High-level global settings (datafile interpolators, variable with solver settings etc – whatever the main programs use) are initialized in include/instantiator.hpp. Structure is sketched on Fig. 4.

Fig. 4 RHM dependency structure.

In what follows all possible ways to instantiate RHM are discussed and covered.