Remake of Fagundes & Wichoski (1987)

[shape-univ w astro.uni.torun.pl]

Thanks Andrzej!

About two years ago, when I nearly got a job at home, Gary Mamon pointed
out that cosmic topology was "heretical" (po polsku "heresia") when I first
started working on the subject, but thanks to work by me and others,
had become "tolerated".

I guess it's now becoming... "fashionable". So we'd better start publishing. :)

b


On Thu, 17 Apr 2003, Andrzej Marecki wrote:

> Paper: astro-ph/0304290
> From: Stephen Weatherley <stephen.weatherley w imperial.ac.uk>
> Date: Tue, 15 Apr 2003 20:02:03 GMT   (254kb)
>
> Title: Ghosts of the Milky Way: a search for topology in new quasar catalogues
> Authors: S.J. Weatherley (1), S.J. Warren (1), S.M. Croom (2), R.J. Smith (3),
>   B.J. Boyle (2), T. Shanks (4), L. Millar (5), M.P. Baltovic (1) ((1) Imperial
>   College London, (2) AAO, (3) Liverpool John Moores, (4) Durham, (5) Oxford)
> Comments: MNRAS Letters, Accepted, 5 pages, 3 figures
> \\
>   We revisit the possibility that we inhabit a compact multi-connected flat, or
> nearly-flat, Universe. Analysis of COBE data has shown that, for such a case,
> the size of the fundamental domain must be a substantial fraction of the
> horizon size. Nevertheless, there could be several copies of the Universe
> within the horizon. If the Milky Way was once a quasar we might detect its
> `ghost' images. Using new large quasar catalogues we repeat the search by
> Fagundes & Wichoski for antipodal quasar pairs. By applying linear theory to
> account for the peculiar velocity of the local group, we are able to narrow the
> search radius to 134 arcsec. We find seven candidate antipodal quasar pairs
> within this search radius. However, a similar number would be expected by
> chance. We argue that, even with larger quasar catalogues, and more accurate
> values of the cosmological parameters, it is unlikely to be possible to
> identify putative ghost pairs unambiguously, because of the uncertainty of the
> correction for peculiar motion of the Milky Way.
> \\ ( http://de.arXiv.org/abs/astro-ph/0304290 ,  254kb)
> ------------------------------------------------------------------------------
>
> At first sight it's rather a dicouraging result - see the last sentence
> above. :-( but...
>
> Let's explore other approaches! :-)
>
> --
> Andrzej
>
>