Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-09-04
Mon.Not.Roy.Astron.Soc. 325 (2001) 1533
Astronomy and Astrophysics
Astrophysics
11 pages, 7 figures. MNRAS accepted version
Scientific paper
10.1046/j.1365-8711.2001.04556.x
We have used recent X-ray and optical data in order to impose some constraints on the cosmology and cluster scaling relations. Generically two kind of hypotheses define our model. First we consider that the cluster population is well described by the standard Press-Schechter (PS) formalism, and second, these clusters are supposed to follow scaling relations with mass: Temperature-Mass (T-M) and X-ray Luminosity-Mass (L_x - M). As a difference with many other authors we do not assume specific scaling relations to model cluster properties such as the usual $T-M$ virial relation or one observational determination of the $L_x-T$ relation. Instead we consider general free parameter scaling relations. With the previous model (PS plus scalings) we fit our free parameters to several X-ray and optical data with the advantage over many other works that we consider all the data sets at the same time. This prevents us from being inconsistent with some of the available observations. Among other interesting conclusions, we find that only low-density universes are compatible with all the data considered and that the degeneracy between $\Omega_m$ and $\sigma_8$ is broken. Also we obtain interesting limits on the parameters characterizing the scaling relations.
Cayón Laura
Diego Jose Maria
Luis Sanz José
Martinez-Gonzalez Enrique
Silk Joseph
No associations
LandOfFree
Constraining our Universe with X-ray & Optical Cluster Data does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Constraining our Universe with X-ray & Optical Cluster Data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraining our Universe with X-ray & Optical Cluster Data will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-486777