Testing dark energy paradigms with weak gravitational lensing

R. Ali Vanderveld, Michael J. Mortonson, Wayne Hu, Tim Eifler

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

Any theory invoked to explain cosmic acceleration predicts consistency relations between the expansion history, structure growth, and all related observables. Currently there exist high-quality measurements of the expansion history from type Ia supernovae, the cosmic microwave background temperature and polarization spectra, and baryon acoustic oscillations. We can use constraints from these data sets to predict what future probes of structure growth should observe. We apply this method to predict what range of cosmic shear power spectra would be expected if we lived in a ΛCDM universe, with or without spatial curvature, and what results would be inconsistent and therefore falsify the model. Though predictions are relaxed if one allows for an arbitrary quintessence equation of state -1≤w(z)≤1, we find that any observation that rules out ΛCDM due to excess lensing will also rule out all quintessence models, with or without early dark energy. We further explore how uncertainties in the nonlinear matter power spectrum, e.g. from approximate fitting formulas such as Halofit, warm dark matter, or baryons, impact these limits.

Original languageEnglish (US)
Article number103518
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume85
Issue number10
DOIs
StatePublished - May 16 2012
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Testing dark energy paradigms with weak gravitational lensing'. Together they form a unique fingerprint.

  • Cite this