Issue |
A&A
Volume 398, Number 3, February II 2003
|
|
---|---|---|
Page(s) | 867 - 877 | |
Section | Cosmology (including clusters of galaxies) | |
DOI | https://doi.org/10.1051/0004-6361:20021715 | |
Published online | 28 January 2003 |
The REFLEX galaxy cluster survey
VII.
and
from cluster abundance and large-scale clustering
1
Max-Planck-Institut für extraterrestrische Physik, Giessenbachstraße 1, 85740 Garching, Germany
2
Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD, UK
3
INAF-Osservatorio di Brera, via Bianchi, 22055 Merate (LC), Italy
Corresponding author: P. Schuecker, peters@mpe.mpg.de
Received:
14
August
2002
Accepted:
14
November
2002
For the first time the large-scale clustering and the mean
abundance of galaxy clusters are analysed simultaneously to get
precise constraints on the normalized cosmic matter density
and the linear theory RMS fluctuations in mass
. A
self-consistent likelihood analysis is described which combines, in a
natural and optimal manner, a battery of sensitive cosmological tests
where observational data are represented by the (Karhunen-Loéve)
eigenvectors of the sample correlation matrix. This method breaks the
degeneracy between
and
. The cosmological tests
are performed with the ROSAT ESO Flux-Limited X-ray (REFLEX) cluster
sample. The computations assume cosmologically flat geometries and a
non-evolving cluster population mainly over the redshift range
. The REFLEX sample gives the cosmological constraints and
their
random errors of
and
. Possible systematic errors
are evaluated by estimating the effects of uncertainties in the
value of the Hubble constant, the baryon density, the spectral slope
of the initial scalar fluctuations, the mass/X-ray luminosity relation
and its intrinsic scatter, the biasing scheme, and the cluster mass
density profile. All these contributions sum up to total systematic
errors of
and
.
Key words: cosmology: cosmological parameters / X-rays: galaxies: clusters
© ESO, 2003
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