Red shift distortions
Fascinated by any developments on the mapping / modelling of cosmic expansion, I found yet another technique which goes back to measuring red shifts of galaxies as opposed to type 1a Supernovae, but with a twist. This time the distortions generated by the motion of galaxies on red shift measurements, e.g local gravitational effects from neighbouring objects, and comparing the data at different epochs (distant and nearby galaxies), is an idea proposed by European astronomers.
from physicsworld…
Measuring galaxy distortions is not new in itself, but by doing so at different cosmic epochs researchers may be able to learn more about the cosmic acceleration. “A discrepancy between the amount of distortion at different times would be a smoking gun for a new theory of gravity,” says Luigi Guzzo of the Brera Astronomical Observatory in
Italy.
more here…