[Cosmo-media] log of irc chat with Bruno from VPRO Mon 21.01.2008

[Boud Roukema]

hi Bruno,

Just looking through the log, there's one point which needs
clarification:

On Mon, 21 Jan 2008, Boud Roukema wrote:

> 15:44 <@boud> rSLS is close to 9.5h^{-1} Gpc  (where you can
> put in h = 0.71 = H_0 / 100km/s/Mpc is the Hubble constant)
> 15:45 <@boud> it only changes slowly if we change Omega_total
> and/or Omega_matter
> 15:45 < Bruno> but would be the size at t=380 000 years, right? 
> 15:46 <@boud> yes

9.5 h^{-1}Gpc is the radius (not diameter) of the SLS, i.e. of the
sphere corresponding to light which was emitted at roughly this age of
the Universe and is observed now near the Earth/Sun, in comoving
units.

To get "local or physical" units, divide by 1100, i.e. the radius of
the SLS was at that time about 8.6 h^{-1} Mpc.

This gives the diameter of the SLS at about 19 h^{-1} Gpc in comoving
units, or 17 h^{-1} Mpc in local (physical) units.

groeten uit Polen
boud