Physics:Vainshtein radius

Short description: Special radius in gravitational physics

Inside the Vainshtein radius

$r_V=l_{\text{P}}{\left(\frac{m_{\text{P}}^{3}M}{m_G^4}\right)}^{\frac{1}{5}}$

with Planck length $l_{\text{P}}$ and Planck mass $m_{\text{P}}$

the gravitational field around a body of mass $M$ is the same in a theory where the graviton mass $m_G$ is zero and where it's very small because the helicity 0 degree of freedom becomes effective on distance scales $r\gg r_V$.

See also

• Physics:Massive gravity – Theory of gravity in which the graviton has nonzero mass