Optimal observables in galaxy surveys

Julien Carron, I. Szapudi

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Pages (from-to)235-238
Number of pages4
JournalProceedings of the International Astronomical Union
Volume10
DOIs
Publication statusPublished - 2015

Fingerprint

galaxies
probability density function
probability density functions
tracers
dark matter
transform
perturbation theory
tracer
sampling
perturbation
statistics
simulation
family
index

Keywords

  • cosmology: large-scale structure of universe
  • cosmology: theory
  • methods: analytical
  • methods: statistical

ASJC Scopus subject areas

  • Astronomy and Astrophysics

Cite this

Optimal observables in galaxy surveys. / Carron, Julien; Szapudi, I.

In: Proceedings of the International Astronomical Union, Vol. 10, 2015, p. 235-238.

Research output: Contribution to journalArticle

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