As stated in the Data Specifications, the electron number density can be calculated as:

n_e = ElectronAbundance ∗ n_H, where n_H = X_H ∗ ρ/m_p

So in this formula, I know that X_H=0.76 is the hydrogen mass fraction. How about the ρ and m_p?

Thank you in advance, Thang Huynh

rho is the symbol for mass density, i.e. PartType0/Density (in the appropriate units).

PartType0/Density

m_p is the proton mass.

Oh I see, thank you very much for your information.

As stated in the Data Specifications, the electron number density can be calculated as:

So in this formula, I know that X_H=0.76 is the hydrogen mass fraction. How about the ρ and m_p?

Thank you in advance,

Thang Huynh

rho is the symbol for mass density, i.e.

`PartType0/Density`

(in the appropriate units).m_p is the proton mass.

Oh I see, thank you very much for your information.