A catalog of intracluster gas temperatures

Details A catalog of intracluster gas temperatures A catalog of intracluster gas temperatures

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...412..479d&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 412, no. 2, p. 479-488.

Statistics

476

Astronomical Catalogs, Cosmic Gases, Galactic Clusters, Gas Temperature, Intergalactic Media, X Ray Sources

Scientific paper

We have searched the Einstein Monitor Proportional Counter (MPC) data base for observations of clusters of galaxies. By coadding the MPC spectra obtained during all pointed observations of clusters with IPC count rates greater than 0.1 counts/s, we have obtained sufficient photon statistics to estimate the X-ray temperature of 84 clusters. Combining the MPC results with EXOSAT and Ginga results reported in the literature yields a combined sample of 104 clusters with known X-ray temperatures. One of the best studied X-ray correlations between clusters is that between their X-ray luminosity and gas temperature. We show that the best-fit power-law relation for our combined cluster sample can be explained by the observed increase in the gas-to-stellar mass ratio between low- and high-temperature clusters. The statistical significance of any evolution in our combined X-ray sample has been examined and compared with the statistical properties of clusters culled from optical catalogs. We find that there is strong evidence for a decrease in the X-ray luminosity of optically rich clusters beyond z approximately about 0.06. This result is used to estimate the normalization of the primordial power spectrum of density fluctuations.

Affiliated with

Also associated with

No associations

Rating

A catalog of intracluster gas temperatures 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 A catalog of intracluster gas temperatures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A catalog of intracluster gas temperatures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1490989