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Alcock-Paczyński test

{c}
{title2=$F_{\rm AP}(z)=H(z)\chi(z)$}

The Alcock-Paczyński parameter compares radial and transverse distance conversion at one redshift. An intrinsically isotropic comoving feature obeys
$$
\frac{\Delta z}{\Delta\theta}=H(z)\chi(z),
$$
so its unknown absolute size cancels.


Alcock-Paczyński parameter

Past exam of the mathematics course of the University of Cambridge / 2023 / iii / Paper 310 / 1 / e / Solution

Alcock-Paczyński parameter ( $F_{AP} (z) = H (z) χ (z)$ )

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Alcock-Paczyński parameter (FAP​(z)=H(z)χ(z))

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Alcock-Paczyński parameter ( $F_{AP} (z) = H (z) χ (z)$ )

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