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Mesure et interpretation du cisaillement cosmologique

Abstract : Cosmic shear analysis has been proven a powerful tool of investigation of statistic properties of power spectrum of dark matter fluctuations.
Recently it has been showed how tomography can give constraints on the evolution of the equation of state of dark energy.
Deep and wide surveys are being performed today or the will start very soon. Their aim is to use the cosmic shear signal to get cosmological constraints with a precision never reached before. On the other hand, we need to affine the method used to estimate the cosmic shear signal and to limit the bias that could affect the cosmological interpretation. This thesis is made in that scenario. I describe the practical aspects of cosmic shear measurement and the sources of bias which can affect the signal and its interpretation. I also present the results of the cosmic shear analysis of the first release of the CFHTLS Deep and Wide survey.
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Contributor : Elisabetta Semboloni <>
Submitted on : Thursday, November 16, 2006 - 5:17:58 PM
Last modification on : Wednesday, December 9, 2020 - 3:09:34 PM
Long-term archiving on: : Tuesday, April 6, 2010 - 7:11:52 PM


  • HAL Id : tel-00114489, version 1


Elisabetta Semboloni. Mesure et interpretation du cisaillement cosmologique. Astrophysique [astro-ph]. Université Pierre et Marie Curie - Paris VI, 2006. Français. ⟨tel-00114489⟩



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