Extending the results of a previous paper (Del Popolo et al., 2005), by taking into account role dynamical friction, we recovered luminosity–temperature relation (LTR) . While assuming self-similarity, scaling law in which L∝T2 is obtained, observations show that between luminosity and temperature steeper, L∝T≃3. This difference can be explained terms energy input non-gravitational processes, l...

We extend our previous analysis which used generalized luminosity functions (GLFs) to predict the number of quasars and galaxies in low-radio-frequency-selected samples as a function of redshift, radio luminosity, narrow-emission-line luminosity and type of unified scheme (Grimes, Rawlings & Willott 2004). Our extended analysis incorporates the observed submillimetre (850 μm) flux densities of ...

Using the lag-luminosity relation and various BATSE catalogs we create a large catalog of burst redshifts, peak luminosities and emitted energies. These catalogs permit us to evaluate the lag-luminosity relation, and to study the burst energy distribution. We find that this distribution can be described as a power law with an index of α = 1.76±0.05 (95% confidence), close to the α = 2 predicted...

Based on the measured sizes of broad line region of the reverberation-mapping AGN sample, two new empirical relations are introduced to estimate the central black hole masses of radio-loud high-redshift (z > 0.5) AGNs. First, using the archival IUE/HST spectroscopy data at UV band for the reverberation-mapping objects, we obtained two new empirical relations between the BLR size and Mgii /Civ e...