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Semi-analytical study on the generic degeneracy for galaxy clustering measurements

Published online by Cambridge University Press:  01 July 2015

Alejandro Guarnizo ,
Luca Amendola ,
Martin Kunz  and
Adrian Vollmer
Alejandro Guarnizo
Affiliation:
Institut Für Theoretische Physik, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany
Luca Amendola
Affiliation:
Institut Für Theoretische Physik, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany
Martin Kunz
Affiliation:
Département de Physique Théorique and Center for Astroparticle Physics, Université de Genève, Quai E. Ansermet 24, CH-1211 Genève 4, Switzerland
Adrian Vollmer
Affiliation:
Institut Für Theoretische Physik, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany
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Abstract

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From the galaxy power spectrum in redshift space, we derive semi-analytical results on the generic degeneracy of galaxy clustering measurements. Defining the observables A = Gbσ8 and R = Gfσ8, (being G the growth function, b the bias, f the growth rate, and σ8 the amplitude of the power spectrum), we perform a Fisher matrix formalism to forecast the expected precision of these quantities for a Euclid-like survey. Among the results we found that galaxy surveys have generically a slightly negative correlation between A and R, and they can always measure R about 3.7 to 4.7 times better than A.

Keywords

cosmology: observationscosmology: theorymethods: statisticalsurveys
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Symposium S306: Statistical Challenges in 21st Century Cosmology , May 2014 , pp. 347 - 350
Copyright
Copyright © International Astronomical Union 2015 

References

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