Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.mrao.cam.ac.uk/~anthony/latex/Roukema.ps Дата изменения: Sat Jun 24 19:33:08 2000 Дата индексирования: Tue Oct 2 03:07:19 2012 Кодировка: Поисковые слова: universe

The Large Scale Structure Peak as a
Comoving Standard Ruler
Boudewijn F. Roukema et al.
Inter-University Centre for Astronomy & Astrophysics, India
(Co-author: Gary A. Mamon) Estimates of the curvature param-
eters
m (density parameter)
and
 (cosmological constant) can
be made geometrically by use of either a standard candle or a
standard ruler. Just as supernovae of Type Ia appear to provide
a good empirical standard candle, it now appears observationally
justied to use the peak in the power spectrum of density per-
turbations at L  130  10h 1 Mpc as an empirical standard
ruler. It will be shown that voids are traced by quasars in a ho-
mogeneous catalogue near the South Galactic Pole at z  2 and
that the large scale structure peak of the catalogue constrains the
value
of
m to 0:1
<
m < 0:45 (68% condence), independently
of
 . Combination with the supernovae Ia data is suфcient to
show that the observable Universe is almost at. In other words,
the combination of a standard ruler and a standard candle de-
tected in present data sets is suфcient to show that the Universe
is nearly at, independently of any microwave background data
or any other data analyses.
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