The behavior of the C IV emission line in active galactic nuclei

Abstract

view Abstract Citations (40) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Behavior of the C IV Emission Line in Active Galactic Nuclei Wamsteker, W. ; Colina, L. Abstract The behavior of the C IV 1550 A emission line strength in variable active galactic nuclei (AGNs) such as Seyfert 1 galaxies and one broad-line radio galaxy (BLRG) is discussed on the basis of low-resolution spectra from IUE. The results are compared with those obtained previously for QSO samples. The variation of individual AGNs indicate that they present matter-bounded conditions when the AGN is in a high-luminosity state. Such behavior is illustrated by the variations seen in the Seyfert 1 galaxy F9, where the transition from photon-bounded to matter-bounded occurs at a transition luminosity of ergs/sec per Hz. The results indicate the existence of a transition luminosity, which appears to be typical for an individual galaxy. An absolute luminosity limit also appears to be present both in the C IV line at 45.0 ergs/sec and for the continuum at 31.7 ergs/sec per Hz. Publication: The Astrophysical Journal Pub Date: December 1986 DOI: 10.1086/164801 Bibcode: 1986ApJ...311..617W Keywords: Active Galactic Nuclei; Carbon; Emission Spectra; Radio Galaxies; Seyfert Galaxies; Iue; Quasars; Spectral Resolution; Stellar Luminosity; Ultraviolet Spectra; Astrophysics; GALAXIES: NUCLEI; GALAXIES: SEYFERT; QUASARS; ULTRAVIOLET: SPECTRA full text sources ADS | data products SIMBAD (7) NED (7) MAST (1) INES (1) Related Materials (1) Erratum: 1990ApJ...351..705W