... We construct a composite quasar spectrum from 149 HST FOS spectra of 80 quasars with mean redshift . ... As part of an archival study, we have constructed a composite spectrum of quasars based on 149 FOS spectra of 80 quasars. ...
... Far-Infrared Observations of Radio Quasars and FR II Radio Galaxies . ... We report MIPS photometry of 20 radio-loud quasars and galaxies at 24 and 70 ЮМm (and of five at 160 ЮМm). ...
... Electronic Editor: H. Payne . Ionization and Thermal Structures of the Absorption-Line Systems of Quasars . Abstract: . ... Next: Quasar Spectral Features Up: QSOsGalaxies, and Previous: Absorption line spectra . Shin Sasaki . ...
... High luminosity and high redshift combine in quasars to give conditions that allow studies of the intergalactic medium, as well as the emission mechanism in quasars. ...
... S. Dunlop 5 We have made radio observations of 87 optically selected quasars at 5 GHz with the VLA in order to measure the radio power for these objects and hence determine how the fraction of radio-loud quasars varies with redshift and optical luminosity ...
... Quasars were discovered in the 1960s. The name is a contraction of 'quasi-stars' or 'quasi-stellar object,' which refers to the fact that quasars are generally point sources (like stars) that have no observable extent. ...
... GO 10762: The long X-ray jet of Quasar 4C19.44. ... i-Band Dropouts around High-z Radio Quasars . Abstract . 10475 . ... The Long X-ray Jet of Quasar 4C19.44 . Abstract . ...
... Ground-Based and HST Optical-Infrared Studies of Quasar Host Galaxies at Low Redshift ... both radio-loud and radio-quiet quasars (RLQs & RQQs) and FRII radio galaxies (RGs ...