DR. ANDREW S. FRIEDMAN
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(a) Animation 4a corresponds to Fig. 2a of Friedman+2013 for the case in which the event redshifts are fixed to zA=1 and zB=3, while the angular separation α as seen from Earth is allowed to vary from 0 to 360 degrees. The green circles show the projection of the past lightcones on the hypersurface τ=τAB when the lightcones first intersect; these are also shown as black circles projected onto the τ=0 plane. The movie represents a point (zA, zB)=(1,3) in the zA - zB plane which lies in the dark gray region of Fig 3b of Friedman+2013 where all event pairs have a shared causal past for any angular separation.

(b) Animation 4b for the same case as in Animation 4a, as viewed in the τ=0 plane at the big bang.

Massachusetts Institute of Technology Harvard University Astronomy Smithsonian Astrophysical Observatory UC Berkeley Astronomy NSF Graduate Research Fellowship NASA Graduate Student Research Program Peters Automated Infrared Imaging Telescope (PAIRITEL) NASA Swift Satellite
Last Updated: Andrew Samuel Friedman, 3/2014

This material is based upon work supported by the National Science Foundation under Grant # 1056580 through an NSF Science, Technology, and Society Postdoctoral Fellowship at MIT.

Original animations are shared under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 US License