Constraining the growth factor with baryon oscillations

• Verfasst von: Sapone, Domenico [VerfasserIn]
• Verfasst von: Amendola, Luca [VerfasserIn]
• Titel: Constraining the growth factor with baryon oscillations
• Verf.angabe: Domenico Sapone and Luca Amendola
• Fussnoten: Gesehen am 15.11.2017
• Titel Quelle: Enthalten in: De.arxiv.org
• Jahr Quelle: 2007
• Band/Heft Quelle: (2007) Artikel-Nummer 0709.2792, 7 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 156536502X

Abstract

The growth factor of linear fluctuations is probably one of the least known quantity in observational cosmology. Here we discuss the constraints that baryon oscillations in galaxy power spectra from future surveys can put on a conveniently parametrized growth factor. We find that spectroscopic surveys of $5000 deg^2$ extending to $z \approx 3$ could estimate the growth index $\gamma$ within 0.06; a similar photometric survey would give $\Delta\gamma\approx 0.15$. This test provides an important consistency check for standard cosmological model and could constrain modified gravity models. We discuss the errors and the figure of merit for various combinations of redshift errors and survey size.