AO4ELT - Detection threshold in high contrast imaging with partially polarized light

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Detection threshold in high contrast imaging with partially polarized light

Abstract 327

Submitted by Natalia YAITSKOVA

Authors

N. Yaitskova

Affiliations

European Southern Observatory

Abstract

We obtain an expression for the probability density function of partially developed speckles formed by light with an arbitrary degree of polarization. From the probability density we calculate the detection threshold corresponding to the 5sigma confidence level of a normal distribution. We show that unpolarized light has an advantage in high contrast imaging for low ratios of the deterministic part of the point spread function to the halo, typical in coronagraphy.