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Optimal observables in galaxy surveys

Published online by Cambridge University Press:  01 July 2015

Julien Carron  and
István Szapudi
Julien Carron
Affiliation:
Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USA email: carron@ifa.hawaii.edu
István Szapudi
Affiliation:
Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USA email: carron@ifa.hawaii.edu
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Abstract

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The sufficient statistics of the one-point probability density function of the dark matter density field is worked out using cosmological perturbation theory and tested to the Millennium simulation density field. The logarithmic transformation is recovered for spectral index close to -1 as a special case of the family of power transformations. We then discuss how these transforms should be modified in the case of noisy tracers of the field and focus on the case of Poisson sampling. This gives us optimal local transformations to apply to galaxy survey data prior the extraction of the spectrum in order to capture most efficiently the information encoded in large scale structures.

Keywords

cosmology: large-scale structure of universecosmology: theorymethods: statisticalmethods: analytical
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Symposium S306: Statistical Challenges in 21st Century Cosmology , May 2014 , pp. 235 - 238
Copyright
Copyright © International Astronomical Union 2015 

References

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