2009

Hubble Diagram Dispersion From Large-Scale Structure

Clifton, Timothy, Zuntz, Joe

Understand

We consider the effects of large structures in the Universe on the Hubble diagram.

  • This problem is treated non-linearly by considering a Swiss Cheese model of the Universe in which under-dense voids are represented as negatively curved regions of space-time.
  • Exact expressions for luminosity distances and redshifts are used to investigate the non-linear effects of structure on the magnitudes of astrophysical sources.
  • It is found that the intervening voids we consider, between the observer and source, produce changes in apparent magnitude of less than 0.012.

Reading the bibliography…