... quasar sample (the proper age of quasars); the steepening of their energy spectra is related to additional (in comparison to ... quasars are GPS sources and about half of all GPS quasars are at ultra-high-z. This may be an indication that a different ...
... Fig. 3 are shown fragments of the echelle spectra of the quasar S5 0014+81 ( ) obtained with the PF echelle spectrograph within the frames of the programme of study of absorption spectra of bright quasars (authors of the programme are D.A.Varshalovich and ...
... So far, nobody was able to observe the process of fast quasar growth, because it ejects such a huge mass of gas and dust that it is not possible to see the quasar itself. ...
... The search for distant objects which can be both galaxies and quasars is one of the most important problems of observational astrphysics, because it allows one to determine cosmological parameters connected with the time of appearence and evolution of ...
... Schmidt, M.; Green, R. F., Quasar evolution derived from the Palomar bright quasar survey and other complete quasar surveys, 1983, ApJ, 269, 352 . ...
... of such tasks, for instance, the observations of absorption spectra of quasars with , when the S/N ratio at an hour exposure is ... The diffraction grating employed in quasar observations with the MSS has with a collimated beam of d coll =258mm. ...