SpECTRE
v2024.05.11
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The scalar charge per unit area. More...
#include <ScalarCharge.hpp>
Public Types | |
using | type = Scalar< DataVector > |
The scalar charge per unit area.
This tag holds the integrand of:
\begin{align*} q = - \dfrac{1}{4 \pi} \oint dA \Phi_i n^{i}, \end{align*}
where \( n^{i} \) is the unit (outward) normal of the surface.
For a spherically symmetric scalar, this value will coincide with the value as extracted from the \(r^{-1}\) decay in
\[ \Psi \sim \phi_\infty + q / r + \cdots~. \]