Interacting models in CAMB
Posted: September 16 2019
Hello everyone,
I am new on CAMB and I want to implement some modifications on the perturbations equations due to a dark energy-dark matter interaction. The kind of modifications I want is easy but I have several questions.
I only want to change the dark energy and dark matter velocity equations using the synchronous gauge:
a) In the model I have, it is not allowed to use the residual gauge freedom to set v_c=0 even it is the synchronous gauge, therefore, should I create a new set of equations and variables in the equations.f90 module to implement a v_c differential equations?
b) In the dark energy sector, should I just modify the DarkEnergyFluid.f90 by adding a term with the Dark matter velocity v_c?
c) If so, how I make CAMB to understand that both equations dark energy and dark matter (delta_c, theta_c, delta_de and theta_de) are all coupled?
d) If I want to use the python camb, should I modify the files I need in \CAMB\fortran and then use "python setup.py make
" and finally use a .ini file in the command line?
Thanks in advance and sorry if it seems as easy questions or asked before but I am totally new on CAMB.
I am new on CAMB and I want to implement some modifications on the perturbations equations due to a dark energy-dark matter interaction. The kind of modifications I want is easy but I have several questions.
I only want to change the dark energy and dark matter velocity equations using the synchronous gauge:
a) In the model I have, it is not allowed to use the residual gauge freedom to set v_c=0 even it is the synchronous gauge, therefore, should I create a new set of equations and variables in the equations.f90 module to implement a v_c differential equations?
b) In the dark energy sector, should I just modify the DarkEnergyFluid.f90 by adding a term with the Dark matter velocity v_c?
c) If so, how I make CAMB to understand that both equations dark energy and dark matter (delta_c, theta_c, delta_de and theta_de) are all coupled?
d) If I want to use the python camb, should I modify the files I need in \CAMB\fortran and then use "python setup.py make
" and finally use a .ini file in the command line?
Thanks in advance and sorry if it seems as easy questions or asked before but I am totally new on CAMB.