The Cluster LX-sigma Relation Has Implications for Scale-Free Cosmologies
Astrophysics
2009-10-31 v1
Abstract
I show that the cluster LX-sigma relation should be sensitive to cosmologies with a scale-free power spectrum of initial density fluctuations, P(k) ~ k^n. I derive the dependence, and argue that a conservative interpretation of current observations implies n < -2.0 and n < -1.1 at the one-sided 90% and 99% confidence levels, respectively. This result, which agrees with constraints on n from the x-ray cluster temperature function, should be roughly independent of the value of Omega or Lambda.
Cite
@article{arxiv.astro-ph/9905270,
title = {The Cluster LX-sigma Relation Has Implications for Scale-Free Cosmologies},
author = {Andisheh Mahdavi},
journal= {arXiv preprint arXiv:astro-ph/9905270},
year = {2009}
}
Comments
4 pages, including 1 figure. To appear in the Astrophysical Journal Letters