Transcript Document
Adam Amara, Thomas Kitching, Anais Rassat, Alexandre Refregier
• Amara & Refregier (2007)
•
weak lensing tomography
• Taylor, Kitching, Heavens, Bacon (2007)
• shear ratio with BAO and SNIa priors
• Heavens, Kitching, Taylor (2007)
• 3D cosmic shear with BAO and SNIa priors
• Kitching, Taylor, Heavens (2008)
• The effect of systematic effects on 3D lensing dark energy constraints
• Rassat et al. (2008)
• Deconstructing BAOs
• Kitching, Amara, Abdalla, Joachimi, Refregier (2008)
• Submitted next week. Full characterisation of cosmological systematics
• Refregier, Amara, Kitching, Rassat (2008)
• iCosmo source code description
Motivation
• Dark Universe, low redshift, cosmological tools &
resources
• Easy, pain-free interface
• Open source
• Community involvement
CMBfast,
CAMB,
CMBeasy
iCosmo
Source Code
• Open Source : download at www.icosmo.org
• Interactive and batch modes
• Online and in-code documentation
• Caters for all levels: research and teaching
• Easy Syntax
• IDL : large number of libraries, easy plotting
• Convenient development platform for research
• Easily extendable
• Coherent structure of routines and functions
• Many open source IDL libraries
Source Code
> fid=set_fiducial(cosmo_in={w0:-0.95})
> cosmo=mk_cosmo(fid)
• In 2 lines calculated
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Distances (angular, comoving, luminosity, light travel)
Hubble parameter
Growth Factor (full derivative)
Linear Power Spectrum
Non-linear power spectrum
QuickTime™ and a
decompressor
are needed to see this picture.
Source Code
> sv=mk_survey(fid,’sv1’)
> cl=mk_cl_tomo(fid,cosmo,sv)
> cl_cov=mk_cl_tomo_cov(fid,cl,sv)
• In 3 more lines calculated
• Lensing power spectrum
• Covariance
• Same for BAO and SNIa
QuickTime™ and a
decompressor
are needed to see this picture.
Source Code
> fid=set_fiducial(cosmo_in={w0:-0.95})
> sv=mk_survey(fid,’sv1’)
> fisher=mk_fisher_lens(fid,sv)
• In 3 lines can calculate
• Tomography Lensing Fisher Matrix
• Same for BAO and SNIa
• Combining Fishers is trivial
QuickTime™ and a
decompressor
are needed to see this picture.
Interactive Web Interface
www.icosmo.org
Resources
• Suite of tutorials and documents
• Fully integrated with the source code and
interactive site
• Wiki pages
• Continually evolving and expanding
• With contributions from experts in each field
• Currently available
• Gravitational Lensing (Sarah Bridle, Alan Heavens, Andy
Taylor, Benjamin Joachimi, Justin Read, Dan Kubas)
• Galaxy Correlations (Luca Amendola, Martin Kunz,
Francisco Castander)
• CMB & ISW (Nabila Aghanim, Marian Doupis)
• Modified Gravity (Jochen Weller, Shaun Thomas, Luca
Amendola)
Resources
www.icosmo.org
Version 1.0
• Open source code
• Intuitive Web Interface
• Calculate :
• Distances, Hubble, Growth
Factor
• Linear & Non-linear Power
Spectrum
• Lensing Power Spectrum
• BAO Distance Scales
• SNIa Magnitude-distance relation
• Lensing Fisher Matrix
• BAO Fisher Matrix
• SNIa Fisher Matrix
• Tutorials
• Weak lensing
• Cosmic Shear
• Strong lensing
• Galaxy correlations
• BAO
• ISW
• Modified Gravity
Conclusions
• Continually evolving and expanded …
• How to get started
• There are video tutorials continually being added, a website
guide coming out soon, and lots of help online.
• Coming Soon:
• CMB & ISW
• w(z) bins (new JDEM FoM)
• Halo model
• Q: Can I be involved? A : Community contributions
are encouraged. [email protected]
www.icosmo.org
Refregier, Amara, Kitching, Rassat (2008) arXiv:0810.1285