INTERACTIVE COSMOLOGICAL TOOLS


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Step 1


Number of cosmologies to investigate:

Cosmology

Ωm ΩDE ΩB
h n s σ8
w0 wa

  Cosmological Products

   Cosmology Functions: Distances, Hubble parameter and Power Spectrum always calculated

   Cosmology Observables: Lensing Power Spectrum   BAO Wiggles   Supernovae Magnitude-Distance Select/UnSelect All

   Cosmology Errors:   Fisher Matrix 1     Fisher Matrix 2


INTERACTIVE TOOLS : STEP 1

Welcome to the Interactive Cosmological Tools. From this page onwards you will be able to customise the cosmological functions and quantities that you create. If at any stage you require more flexibility than we have provided here you can download the iCosmo source code from here.

The step-by-step process begins here where you can choose the input cosmology that you wish to calculate your functions for, and the type of functions you want to make. By clicking on "Begin Calculations" you will be taken to the next step where you will see further options relavent to the choices made here.

  • Step 1: Input Cosmology, Choice of Calculation Options
  • Step 2: Additional Numerical Options
  • Step 3: Survey Options (only given if observables or Fisher matrices are choosen)
  • Final Step: Interactive Plotting Tools

We will always calculate the following functions for you:

In addition to this base-line you can extend your calculations to include observables or cosmological error predictions. Observables are functions that one may use in order to constraint cosmological parameters, you can choose between: Fisher matrices allow you make predictions about the cosmological error performance of an experiment. You can choose up to two surveys (which can later be combined if desired) where each experiment can be either: Page Top
INPUT COSMOLOGY

Throughout the calculations we set the density due to spatial curvature to Ωk=1-Ωm-ΩDE. To impose a flat cosmology then the user should set the the parameter ΩDEto ΩDE=1-ΩM in the input.

You can choose to investigate one or two input cosmologies. Each input cosmology can be customised by filling in the boxes with the number you require. By default these care filled in with numbers roughly consistent with current constraints. The choice of Cosmology will affect all of the options choosen: base-line functions, observables and Fisher matrices.

If you wish to compare the base-line functions or the observables for two different cosmologies then select 2 cosmologies from the drop-down menu.

By choosing two cosmologies the default of the second cosmology is given a different value of the dark energy equation of state parameter w0. Note that when two cosmologies are choosen the Fisher matrices will be calculated assuming Cosmology 1. The choice of two cosmologies is to allow you to compare the effect of changing cosmlogical parameters on basic cosmological functions and observables.

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