logging in or signing up Levy Richie Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 25 Category: Travel/ Places.. License: All Rights Reserved Like it (0) Dislike it (0) Added: August 27, 2007 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Determining the expansion history of the universe with the 3D cosmic shear : Determining the expansion history of the universe with the 3D cosmic shear Ram Brustein, Daniel Levy Ben Gurion University astro-ph/0609543 astro-ph/0607435, Aim : Aim Model independent knowledge of wtot Functional dependence of probes on the equation of state Sensitivity of probes to changes in w Background motivation: Background motivation Kinematical probes Dynamical probes Depend on wtot HOW?! Background motivation: Background motivation Kinematical probes Dynamical probes Depend on wtot HOW?! Slide5: P. Antilogus J. Frieman et al Weller andamp; Albrecht Similar conclusions : many more I. Maor et al CANN O T MEASURE w’ Background motivation: Background motivation Kinematical probes Dynamical probes ? Depend on wtot HOW?! Evolution of Ф(z): Evolution of Ф(z) Solving for Φ: Solving for Φ EOM (for adiabatic perturbation) for a two fluid system: Φ= Φm+ ΦDE 0 Solving for Φ: Solving for Φ EOM (for adiabatic perturbation) for a two fluid system: Φ= Φm+ ΦDE In matter domination ΦDE decays faster than Φm 0 Solving for Φ: Solving for Φ The solution for cold matter in DE background wDE , Ωm Relating shear and potential: Relating shear and potential Relating shear and potential: Relating shear and potential Subtracting the nonlinear part and Observables: Subtracting the nonlinear part and Observables Analysis of the functional dependence: Analysis of the functional dependence Parameterization after all…: Parameterization after all… Influence of non-flat spectrum: Influence of non-flat spectrum Measuring n ? …: Measuring n ? … Summery: Summery wtot(z) can be measured by cosmic shear with less degeneracy or prior assumptions There’s an accuracy 'barrier' for gaining more information ~5% Few probes are needed ( dL to more then 1%...) Measuring the spectral index?... Better quantities can be found… Better calculations should be done… You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
Levy Richie Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 25 Category: Travel/ Places.. License: All Rights Reserved Like it (0) Dislike it (0) Added: August 27, 2007 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Determining the expansion history of the universe with the 3D cosmic shear : Determining the expansion history of the universe with the 3D cosmic shear Ram Brustein, Daniel Levy Ben Gurion University astro-ph/0609543 astro-ph/0607435, Aim : Aim Model independent knowledge of wtot Functional dependence of probes on the equation of state Sensitivity of probes to changes in w Background motivation: Background motivation Kinematical probes Dynamical probes Depend on wtot HOW?! Background motivation: Background motivation Kinematical probes Dynamical probes Depend on wtot HOW?! Slide5: P. Antilogus J. Frieman et al Weller andamp; Albrecht Similar conclusions : many more I. Maor et al CANN O T MEASURE w’ Background motivation: Background motivation Kinematical probes Dynamical probes ? Depend on wtot HOW?! Evolution of Ф(z): Evolution of Ф(z) Solving for Φ: Solving for Φ EOM (for adiabatic perturbation) for a two fluid system: Φ= Φm+ ΦDE 0 Solving for Φ: Solving for Φ EOM (for adiabatic perturbation) for a two fluid system: Φ= Φm+ ΦDE In matter domination ΦDE decays faster than Φm 0 Solving for Φ: Solving for Φ The solution for cold matter in DE background wDE , Ωm Relating shear and potential: Relating shear and potential Relating shear and potential: Relating shear and potential Subtracting the nonlinear part and Observables: Subtracting the nonlinear part and Observables Analysis of the functional dependence: Analysis of the functional dependence Parameterization after all…: Parameterization after all… Influence of non-flat spectrum: Influence of non-flat spectrum Measuring n ? …: Measuring n ? … Summery: Summery wtot(z) can be measured by cosmic shear with less degeneracy or prior assumptions There’s an accuracy 'barrier' for gaining more information ~5% Few probes are needed ( dL to more then 1%...) Measuring the spectral index?... Better quantities can be found… Better calculations should be done…