SIMBAD references

We analyzed the luminosity-temperature (L-T) relation for two samples of galaxy clusters that have been observed by the ASCA satellite. We used 32 high-redshift clusters (0.3<z<0.6), 53 low-redshift clusters (z<0.3), and also the combination of the low- and high-redshift data sets. This is one of two surveys to use only ASCA data and has the largest number of high-redshift clusters. We assumed a power-law relation between the bolometric luminosity of the galaxy cluster and its integrated temperature (uncorrected for cooling flows) and redshift [L_bol,44=CT^α(1+z)^A]. We found that for an Ω_M=1.0, Ω_Λ=0.0 universe, A=1.134^+1.057_–1.073±1.66, α=2.815^+0.322_–0.316±0.42, and logC=-1.167^+0.216_–0.221±0.25, and for an Ω_M=0.3, Ω_Λ=0.7 universe, A=2.052^+1.073_–1.058±1.63, α=2.822^+0.320_–0.323±0.43, and logC=-1.126^+0.223_–0.219±0.26 (all errors at 68% confidence for one and two interesting parameters). We found the dispersion at constant kT in this relation to be ΔlogL=0.282 for Ω_M=1.0, Ω_Λ=0.0, and ΔlogL=0.283 for Ω_M=0.3, Ω_Λ=0.7. The results for the combined data set and those found using the low- and high-redshift clusters are consistent and independent of cosmology, with previous estimates of L∼T³ found by other authors. The observed weak or zero evolution agrees with the predictions of models that produce L∼T³ incorporating an initial source of nongravitational energy before cluster collapse.: