seminar at Mt Stromlo

[Boud Roukema]

Cze¶æ wszystkim,

On Tue, 4 Jun 2002, Gary Mamon wrote:
> Dear all,
>
> My talk at Mt Stromlo went very well.
>
> Brian Schmidt of supernovae fame made a good remark. Instead of looking

I met Brian on my last visit to Stromlo - and hopefully convinced him to
drop the word "global" from his description of his work on *local*
cosmological parameters...

> for peaks, which could simply require that the xi(r)'s in different z bins
> are similar (he thought of using a maximum likelihood technique). He was

Micha³ Fr±ckowiak had the same idea last Friday :) - he suggested
multiplying  xi_1 xi_2 and dividing by the uncertainties, also
abs(xi_1-xi_2).  Given the different amplitudes at different redshifts,
it seems that   xi_1  xi_2  is the most reasonable.

> referring to Alcock & Paczynski...
>
> Matthew Colless mentioned that both 2dF galaxies (2dFGRS) and quasars
> (2QZ) show a feature in P(k) at 2pi/89 h Mpc-1.
>
> Matthew's postdoc, Roberto de Propris, showed me a plot of the correlation
> function of the superposition of many pencil beams drawn through the
> 2dFGRS. He has access to the full 250k sample, and avoided computing a
> complete xi(r)  using all 30 billion separations. There is a feature
> around 250 Mpc, but there are also stronger features elsewhere, but not at
> 130 h-1 Mpc. It thus appears that Broadhurst et al. were lucky back in
> 1990.

Well, I still think the 2dFGRS has much too small a volume to be
able to say anything as significant as the 2QZ, which covers a much
larger volume.

Na ra¿e
Boud