Back to Normal – Box-Cox Transformations in Cosmology

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• Benjamin Joachimi (Institute for Astronomy, Royal Observatory, Edinburgh)
• Tuesday 23 October 2012, 16:30-17:30
• Ryle Seminar Room, Cavendish Laboratory.

If you have a question about this talk, please contact David Titterington.

Box-Cox transformations are a widely used Gaussianisation tool in various research areas, which has received little attention in astrophysics so far. I am going to present two recent cosmological applications of Box-Cox transformations. They were used to Gaussianise the weak lensing projected mass distribution, as a generalisation of the currently en-vogue logarithmic transformations, with the goal of maximising the information contained in two-point statistics. Moreover I will present work on the generalisation of Fisher matrices by means of Box-Cox transformations in order to produce predictions of arbitrary posterior distributions and discuss the potential of this ansatz to construct statistically independent parameter sets for arbitrary inference problems.

This talk is part of the Cavendish Astrophysics Seminars series.

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