Statistical methods of analyses have been used to find some difference in some parametric relationships in the two subclasses of compact steep spectrum (CSS) sources. These sub-classes include CSS quasars and CSS galaxies. This is done by carrying out linear regression analyses o...
We use statistical methods of analysis to show that Large extended extragalactic radio sources (large EGRS) and compact steep spectrum (CSS) sources are similar sources evolving in different environments. Because of the diversity of their ambient media, one suffers higher magnitu...
We use both analytical methods and statistical methods to show that certain physical processes (such as jet internal pressure and luminosity) which occur in radio galaxies may be propelled by both the source central engine and dark/vacuum energy. We do this by carrying out linear...
In this work, we use both analytical methods and statistical methods to find effect of dark energy on the extragalactic radio (EGR) quasar luminosity evolution. We carry out linear regression analysis of observed source linear sizes (D) of the more extended radio quasars against...
We have applied in this work, statistical methods of analyses to find empirically some effect posed by source expansion on radiated power of extragalactic radio sources. The subclasses of the sources used are radio-loud quasars and radio galaxies. We have done this by carrying ou...
We have used both analytical and statistical methods to show some plausible consequences of the luminosity/redshift relationships for compact steep spectrum (CSS) quasars and the more extended extragalactic radio (EGR) quasars. From the analytical methods (or theory), we find tha...
Open access
Research Article10.9734/ajr2p/2021/v5i430172
Here, we use statistical methods of analyses to find the effects of cosmological evolution on the galactic sizes using compact steep spectrum (CSS) sources. We have done this by carrying out linear regression analysis of observed source linear sizes (D) of CSS quasars against the...
In this work, we use statistical methods of analyses to find effects of the intergalactic medium (IGM) and interstellar medium (ISM) of some extragalactic radio sources on dark energy. We carry out linear regression analysis of observed source linear sizes (D) of the more extende...
In this work, we use analytical methods to describe expansion of Extragalactic Radio Sources (EGRS). Result shows that source size expansion depends on the following parameters: age of the source, lobe internal pressure, ambient medium density, and angle of observation. Moreover,...
Open access
Research Article10.9734/psij/2021/v25i230241
We use analytical methods to develop a mathematical model that expresses the relationship between the linear size of some extragalactic radio sources (EGRS) and their redshift . Result shows that , where . For the purpose of obtaining an empirical relation of similar form, we ca...
Open access
Research Article10.9734/ajr2p/2021/v4i230139