Issue |
A&A
Volume 366, Number 1, January IV 2001
|
|
---|---|---|
Page(s) | 1 - 6 | |
Section | Astrophysical processes | |
DOI | https://doi.org/10.1051/0004-6361:20000350 | |
Published online | 15 January 2001 |
Lifting cosmic degeneracy within a single quasar survey
1
Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Ganeshkhind, Pune, 411 007, India
2
Institut d'Astrophysique de Paris (CNRS UPR 341), 98bis Bd Arago, 75014 Paris, France
3
DAEC (CNRS UMR 8631), Observatoire de Paris-Meudon, 5 place Jules Janssen, 92195 Meudon Cedex, France
B. F. Roukema
Received:
8
September
2000
Accepted:
19
October
2000
In the almost Friedmann-Lemaître
model of the Universe, the density parameter, , and the
cosmological constant,
,
measure curvature. Several linearly degenerate relations between these
two parameters have recently been measured.
Here, large scale structure
correlations at
h-1 Mpc are found in the comoving
three-dimensional separations of redshift
quasars. These function as a comoving standard rod
of length
h-1 Mpc.
A local maximum in the correlation function at
also appears to be significant.
By combining separate
radial and tangential standard ruler analyses,
the lifting of the
linear degeneracy within a single data set
is demonstrated for the first time.
Key words: cosmology: observations / cosmology: theory / distance scale / quasars: general / large-scale structure of Universe / reference systems
© ESO, 2001
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