M. N.Al Najm, Y.E.Rashed and Hasanain.H. AL-Dahlaky
Abstract
We report a statistical analysis of samples of galaxies with active galactic nuclei (Seyferts 1, Seyferts 2,
and quasars) taken from ROSAT Bright Source Catalogue (RBSC) and the NRAO VLA Sky Survey
(NVSS) of bright X-ray galaxies. We investigate multi-wavelength observations including in the radio (1.4
GHz), the blue optical (4400 A0) and the X-ray (0.1-2.4 keV) bands. For Seyfert 1 galaxies the results of a
statistical analysis shows that there is a strong correlation between the quantities ( L D X ray and
L D 1.4 correlations), and the slopes of the relation(L D B ) are flatter than the slope of 0.5 expected
for cosmologically nearby objects, while for Seyfert 2 type galaxies, we find that a very strong correlation
between relation(L D X ray and L D B ), which indicates that, the Seyfert 2 have active components
unrelated with the radio emission compared to Seyfert 1. We also found that, the Seyfert 1 and 2 galaxies
show a strong linear relation between (L D X ray ), which could be related to the presence a very high Xrays
emission in broad emission lines in their nucleus. The slopes of the relation between the X-ray
emission and distance galaxies for QSO galaxies are significantly steeper than radio continuum, blue
emissions and distance (slope ~ 1) with probability of chance correlation, P <107 . We can conclude that,
the presence of a large star formation activity in these galaxies depends linearly on the correlations
between galactic luminosities and distance. At large distances this effect may be dominant
حسنين حسن علي | Hasanain Hassan Ali | 4010