University of Edinburgh CFHTLenS Collaboration WiggleZ Collaboration March 2012 Testing the Laws of Gravity with CFHTLenS and WiggleZ Modified Gravity or Dark Matter NASA Dark Matter ID: 330609
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Fergus Simpson University of Edinburgh+ CFHTLenS Collaboration + WiggleZ CollaborationMarch 2012
Testing the Laws of Gravity with
CFHTLenS and WiggleZSlide2Slide3
Modified Gravity or Dark Matter?
NASADark MatterSlide4
Modified Gravity or Dark Energy?EITHERThe bulk of the Universe violates the strong energy condition OR
Our theory of gravity is wrongSlide5
Boundaries of Classical Gravity
1Slide6
Boundaries of Classical GravityLaboratory
1Slide7
Boundaries of Classical GravityLaboratory
Solar System
1Slide8
Boundaries of Classical GravityLaboratory
Solar System
Cosmology
1Slide9
Alternative Theories of Gravityf(R)TeVeSHořava-LifschitzDGPBraneworld
Bimetric Theories…For a review see Clifton et al (2011)Slide10
ParameterisationGravitational potential as experienced by galaxies:Gravitational potential as experienced by photons:Slide11
ParameterisationSlide12
Previous Constraints EG
(Reyes et al 2010) + BAO (Percival et al 2010)Flat LCDMSlide13
DataCFHTLenS Cosmic ShearTwo redshift bins; 1 < θ < 100 arcmin
WiggleZ Redshift Space Distortions (Blake et al. 2011)Auxiliary DataWMAP7 ( l >100)H0=73.8 ± 2.4
km s-1 Mpc-1 (Riess et al. 2011)Utilise
CosmoPMC, MGCAMB, WMAP Likelihood, CosmoloGUI
Blake et al 2011