Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.509e&link_type=abstract
Abstracts of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology, held in Paris, France, Dec. 14-18, 1998. Eds.:
Astronomy and Astrophysics
Astrophysics
Scientific paper
We present a detailed and homogeneous analysis of the ROSAT PSPC surface brightness profiles of 34 clusters of galaxies with high X-ray luminosity (L_X > 1045 erg s^{-1}) and redshifts between 0.05 and 0.44. Using recent ASCA estimates of their intracluster temperature, we constrain the gas and dark matter distributions. The values of f_gas show highly significant variations between individual clusters, with a biweight location and scale of 0.172 +- 0.034 h50^{-1.5}. Combining these results with primordial nucleosynthesis calculations, and the current estimate of H_0, the above mean value implies Omega_0, m < 0.54 at the 95 per cent confidence level. This upper limit decreases to 0.31, if we take the highest significant estimate for f_gas. The average radial dependence of the gas fraction within a cluster is as r^s, with s ~0.18
Ettori Stefano
Fabian Andrea C.
No associations
LandOfFree
Constraints on the gas fraction from ROSAT PSPC observations of high-luminous clusters of galaxies 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 the gas fraction from ROSAT PSPC observations of high-luminous clusters of galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraints on the gas fraction from ROSAT PSPC observations of high-luminous clusters of galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-769780