Comments on a paper by Katz regarding charge exchange models

Abstract

view Abstract Citations (2) References (16) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Comments on a paper by Katz regarding charge exchange models. Stoner, R. ; Ptak, R. Abstract Katz has criticized the "charge exchange model" for the production of broad emission lines in Seyfert galaxies and quasars, citing the absence of strong narrow cores in observed emission lines, the ionization and acceleration by fast protons of the ambient gas that supplies the electrons for charge exchange, the apparently insufficient overall luminosity of type 1 Seyferts relative to the energy in suprathermal protons, and the widths of hydrogen emission lines in 14329 A. We consider these criticisms in the light of more recent work on charge exchange models, finding that they are not major objections to the charge exchange mechanism for broad-line production, but that they may provide clues to the physical nature of such emission-line objects. Subject headings: atomic processes - galaxies: nuclei - galaxies: Seyfert - quasars Publication: The Astrophysical Journal Pub Date: June 1977 DOI: 10.1086/155290 Bibcode: 1977ApJ...214..653S Keywords: Astronomical Models; Charge Exchange; Emission Spectra; Line Spectra; Quasars; Seyfert Galaxies; Galactic Radiation; Spectral Line Width; Spectrum Analysis; Nuclear and High-Energy Physics full text sources ADS |