On Sat, 22 Dec 12, Phillip Helbig wrote:
I wrote:
One of the models that I'm juggling treats time dilation as the
square root of the redshift,

Is there any physical motivation for this?

Yes, one model of "geometry of look-back" is that we see the past as
smaller and slower than the present, because of the drift of a (new)
cosmological factor. This maps into seeing the nightsky as an
open-manifold universe with a redshift. So this proposes to swap this
one new cosmological factor for all of yours (dark energy, etc, you
know what they all are).

But I have to well-fit this to all observations, which is daunting for
me, since so much observational data is published only as
post-FRW-processed data, which is hard for me to decode backwards. I
may indeed have to do as you and Steve Willner kindly suggest, which
is to request the original data from the authors.

I remind all that the usual riposte to the "many worlds" advocates is
that we prefer to economize on universes. Similarly, I wish to
economize on all the magic tropes of modern cosmology, and remind all
that things flying apart at high speed is no way to model a universe.

And happy holidays! :-)