Institute of Astronomy

Constraints on dark energy and modified gravity from combined large-scale structure probes

SpeakerTalk DateTalk Series
Alessio Spurio Mancini23 January 2019Institute of Astronomy Seminars


The main goal of current and future surveys is to use different
cosmological probes to investigate the true nature of cosmic
acceleration. In this talk I will present cosmological constraints
obtained from a combined analysis of weak gravitational lensing,
galaxy-galaxy lensing and galaxy clustering from the Kilo-Degree Survey
(KiDS) and the Galaxy And Mass Assembly (GAMA) survey, including all the
cross-correlations between the different probes. With this analysis we
set constraints on parameters that describe the Horndeski class of dark
energy and modified gravity models, which includes the majority of
extensions to ΛCDM that could explain cosmic acceleration. I will
conclude my talk with a look at how these constraints can be improved
with data from future Stage IV cosmological surveys.


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