ld_from_kipping

luas.exoplanet.transit_fns.ld_from_kipping(q1: Array, q2: Array) → Tuple[Array, Array]

Converts limb darkening parameters from the Kipping (2013) parameterisation to the standard quadratic limb darkening coefficients:

\[I(r) = 1 − u_1(1 − \mu) − u_2(1 − \mu)^2\]

Values are converted using:

\[u_1 = 2 \sqrt{q_1} q_2\]

\[u_2 = \sqrt{q_1} (1 - 2 q_2)\]

Parameters:

• q1 (JAXArray) – The first limb darkening coefficient(s).

• q2 (JAXArray) – The second limb darkening coefficient(s).

Returns:

The first and second quadratic limb darkening coefficient(s) in the standard parameterisation.

Return type:

(JAXArray, JAXArray)