The spectral flux distributions of sources in an optically selected sample of QSOs - 10 to the 13th-10 to the 15th HZ

Abstract

view Abstract Citations (12) References (11) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The spectral flux distributions of sources in an optically selected sample of QSOs - 10 to the 13th-10 to the 15th HZ Capps, R. W. ; Sitko, M. L. ; Stein, W. A. Abstract Previously published data is combined with extentions of VLA data on optically-selected QSOs from the 6 cm wavelength to 3.5, 10 and 20 microns, to examine potential differences between spectral flux distributions of radio-loud and radio-quiet QSOs. It is found that some objects have steep spectral distributions in the IR which are similar to the flux distribution of the type 2 Seyfert galactic nucleus NGC 1085, and that most low-redshift quasars have a type of spectral distribution similar to that of objects with strongly nonthermal characteristics. Some high-redshift quasars that are radio-quiet exhibit flat flux distributions. The question of whether this flat flux distribution phenomenon indicates a weak, nonthermal contribution at UV wavelengths in the rest system of these objects, which could be related to the low radio emission, is addressed. Publication: The Astrophysical Journal Pub Date: April 1982 DOI: 10.1086/159842 Bibcode: 1982ApJ...255..413C Keywords: Astronomical Spectroscopy; Infrared Spectra; Quasars; Red Shift; Spectral Energy Distribution; Radio Astronomy; Spectrophotometry; Visible Spectrum; Astrophysics full text sources ADS | data products NED (20)