First spectroscopic variability in a z~7 LRD shows rapid changes in both narrow and broad line regions, implying direct ionization from the central source to surrounding nebular gas.
Ron Bracewell and Peter B Kahn
8 Pith papers cite this work, alongside 927 external citations. Polarity classification is still indexing.
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DGPFM stacks GP-based linear and nonlinear transformations in function space via kernel integrals and inducing-point variational learning for function-on-function regression.
JWST observations of ERQs show stratified gas kinematics via deblended optical emission lines, with UV lines dominated by scattered light and optical lines mixing scattered and obscured emission.
Elliptical BLR geometries cause the virial factor f to vary by over an order of magnitude and induce ~0.18 dex scatter in the R-L relation, challenging attributions of RM uncertainties to non-virial motions or radiation pressure.
Mid-infrared lines near Sgr A* exhibit no detectable variability during flares, because light-crossing and recombination timescales in the extended gas suppress responses, so the lines cannot constrain instantaneous UV flux.
2MASX J0413-0050 transitioned from a narrow-line Seyfert 1 to a Seyfert 1.9 and back while remaining in a high accretion state, supporting classification as a changing-state AGN.
Reverberation lags in Mrk 817 range 3-8 days, exceed thin-disk models by factors of 3-6, follow a λ^{4/3} trend with the ICCF method, and vary by up to a factor of 2 between epochs.
A review summarizing detection methods, population statistics, and coevolution of supermassive black holes with host galaxies from early universe observations and simulations.
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The GlimmIr: Spectroscopic Variability in a z~7 LRD Indicates Rapid Changes in Both the Narrow and Broad Line Regions
First spectroscopic variability in a z~7 LRD shows rapid changes in both narrow and broad line regions, implying direct ionization from the central source to surrounding nebular gas.
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Deep Gaussian Processes for Functional Maps
DGPFM stacks GP-based linear and nonlinear transformations in function space via kernel integrals and inducing-point variational learning for function-on-function regression.
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Kinematic Stratification in Extremely Red Quasars Revealed by JWST
JWST observations of ERQs show stratified gas kinematics via deblended optical emission lines, with UV lines dominated by scattered light and optical lines mixing scattered and obscured emission.
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The Impact of Elliptical Broad-Line Regions on Reverberation-Based Black Hole Mass Estimates
Elliptical BLR geometries cause the virial factor f to vary by over an order of magnitude and induce ~0.18 dex scatter in the R-L relation, challenging attributions of RM uncertainties to non-virial motions or radiation pressure.
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An X-ray and optical spectral study of the changing-look narrow-line Seyfert 1 2MASX J0413-0050
2MASX J0413-0050 transitioned from a narrow-line Seyfert 1 to a Seyfert 1.9 and back while remaining in a high accretion state, supporting classification as a changing-state AGN.
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AGN STORM 2. XII. Ground-Based Optical Photometry and Lag Measurements of Mrk 817
Reverberation lags in Mrk 817 range 3-8 days, exceed thin-disk models by factors of 3-6, follow a λ^{4/3} trend with the ICCF method, and vary by up to a factor of 2 between epochs.
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Massive black holes and their galaxies
A review summarizing detection methods, population statistics, and coevolution of supermassive black holes with host galaxies from early universe observations and simulations.