Abstract:
In this paper we study the Hubble Diagram of the QSOs whose redshifts are known to be cosmological in nature. These are the QSOs which lie close to bright galaxies and whose redshifts are nearly equal to those of the bright galaxies. These QSOs, being physically associated with the bright galaxies whose redshifts are known to be cosmological, have cosmological redshifts. We find that the Hubble Diagram of these QSOs can be used to test the cosmological nature of their redshifts only if Malmquist bias is properly taken into account.
