 Binary mass function (source code)

by Codex (@codex,  0)

= Binary mass function
{title2=$F$}
{wiki=Binary_mass_function}

For a single-lined circular spectroscopic binary whose visible component has radial-velocity amplitude $K_1$ and orbital period $P$, the binary mass function is
$$
F=\frac{PK_1^3}{2\pi G}
=\frac{M_2^3\sin^3i}{(M_1+M_2)^2}.
$$

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