Theoretical quasar emission-line ratios. VII - Energy-balance models for finite hydrogen slabs

Abstract

view Abstract Citations (31) References (39) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Theoretical quasar emission-line ratios. VII. Energy-balance models for finite hydrogen slabs. Hubbard, E. N. ; Puetter, R. C. Abstract The authors present energy-balance calculations for finite, isobaric, hydrogen-slab quasar emission-line clouds which incorporate probabilistic radiative transfer (RT) in all lines and bound-free continua of a five-level plus continuum model hydrogen atom. They discuss the resulting line ratios, regions of line formation, level populations, and range of applicability of the models. The calculations neglect the effects of heavy elements and secondary ionizations from primary photoelectrons. An appendix presents a detailed comparison of differences between four different methods of treating the radiative transfer: (1) the probabilistic method, (2) an exact RT solution, (3) an effective two-level ρ = pe energy-balance calulation, and (4) a ρ = pe calculation explicitly incorporating indirect photon creation and destruction paths. Publication: The Astrophysical Journal Pub Date: March 1985 DOI: 10.1086/162997 Bibcode: 1985ApJ...290..394H Keywords: Balmer Series; Emission Spectra; Hydrogen Clouds; Quasars; Radiative Transfer; H Alpha Line; Lyman Spectra; Photoionization; Seyfert Galaxies; Thermodynamic Equilibrium; Astrophysics full text sources ADS | data products SIMBAD (1) NED (1) Related Materials (8) Part 1: 1981ApJ...243..381C Part 2: 1981ApJ...243..390C Part 3: 1981ApJ...248...82C Part 4: 1982ApJ...256..798C Part 5: 1981ApJ...251..446P Part 6: 1982ApJ...260...44P Part 7: 1982ApJ...258...46P Part 9: 1985ApJ...295..394P