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4 papers · 1 filter
Quasar Tomography: Unification of Echo Mapping and Photoionisation Models
Keith Horne, Kirk T Korista, Michael R Goad
Reverberation mapping uses time-delayed variations in photoionised emission lines to map the geometry and kinematics of emission-line gas in active galactic nuclei. In previous wor…
Chemical Abundances in Broad Emission Line Regions: The "Nitrogen-Loud" QSO 0353-383
J. A. Baldwin, F. Hamann, K. T. Korista +3
The intensity of the strong N V 1240 line relative to C IV 1549 or to He II 1640 has been proposed as an indicator of the metallicity of QSO broad emission line regions, allowing a…
The Mass of Quasar Broad Emission Line Regions
J. A. Baldwin, G. J. Ferland, K. T. Korista +2
We show that the mass of ionized gas in the Broad Line Regions (BLRs) of luminous QSOs is at least several hundred Msun, and probably of order 10^3-10^4 M_sun. BLR mass estimates i…
Resonant inelastic x-ray scattering study of charge excitations in La2CuO4
Y. J. Kim, J. P. Hill, C. A. Burns +5
We report a resonant inelastic x-ray scattering study of the dispersion relations of charge transfer excitations in insulating LaCuO. These data reveal two peaks, both of w…