<math>~\Phi_\mathrm{TR}(\varpi,z)</math> |
<math>~=</math> |
<math>~-\biggl[ \frac{2GM}{\pi } \biggr]\frac{1}{\sqrt{(\varpi+a)^2 + z^2}} K(k) \, ,</math> |
|
<math>\mathrm{where:}~~~k \equiv \{4a\varpi /[ (\varpi+a)^2 + z^2]\}^{1 / 2}</math> |