Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-08-30
Astronomy and Astrophysics
Astrophysics
Baltic astronomy in print
Scientific paper
In this paper, I revisit the constraints obtained by several authors (Reichart et al. 1999; Eke et al. 1998; Henry 2000) on the estimated values of $\Omega_{\rm m}$, $n$ and $\sigma_8$ in the light of recent theoretical developments: 1) new theoretical mass functions (Sheth & Tormen 1999, Sheth, Mo & Tormen 2001, Del Popolo 2002b); 2) a more accurate mass-temperature relation, also determined for arbitrary $\Omega_{\rm m}$ and $\Omega_{\rm \Lambda}$ (Del Popolo 2002a). Firstly, using the quoted improvements, I re-derive an expression for the X-ray Luminosity Function (XLF), similarly to Reichart et al. (1999), and then I get some constraints to $\Omega_{\rm m}$ and $n$, by using the {\it ROSAT} BCS and {\rm EMSS} samples and maximum-likelihood analysis. Then I re-derive the X-ray Temperature Function (XTF), similarly to Henry (2000), re-obtaining the constraints on $\Omega_{\rm m}$, $n$, $\sigma_8$. Both in the case of the XLF and XTF, the changes in the mass function and M-T relation produces an increase in $\Omega_{\rm m}$ of $ \simeq 20%$ and similar results in $\sigma_8$ and $n$.
Ercan N.
Popolo Antonino Del
No associations
LandOfFree
Constraints on cosmological parameters through clusters XLF and XTF 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 Constraints on cosmological parameters through clusters XLF and XTF, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraints on cosmological parameters through clusters XLF and XTF will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-115687