Simultaneous constraints on bias, normalization and growth index through power spectrum measurements

• Verfasst von: Di Porto, Cinzia [VerfasserIn]
• Verfasst von: Amendola, Luca [VerfasserIn]
• Verfasst von: Branchini, Enzo [VerfasserIn]
• Titel: Simultaneous constraints on bias, normalization and growth index through power spectrum measurements
• Verf.angabe: Cinzia Di Porto, Luca Amendola, Enzo Branchini
• Fussnoten: Gesehen am 13.11.2017
• Titel Quelle: Enthalten in: De.arxiv.org
• Jahr Quelle: 2012
• Band/Heft Quelle: (2012) Artikel-Nummer 1201.2455, 6 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1565259599

Abstract

In this Letter we point out that redshift surveys can break the degeneracy between the galaxy bias, the power spectrum normalization, \sigma_{8,0} and the growth factor, without the need for external information by using a simple and rather general parametrization for the growth rate, the well known \gamma-parametrization and measuring the power spectrum at least at two different redshifts. We find that in next-generation surveys like Euclid, \sigma_{8,0} and \gamma can be measured to within 1% and 5%, respectively, while the bias b(z) can be measured to within 1-2% in each of 14 equal-width redshift bins spanning 0.7<=z<=2.