Using simultaneous modeling of continuum lag-spectrum and broadband SED of Fairall 9 with the H0RIZON-AGN model, the authors obtain H0 = 72.4_{-3.7}^{+3.4} km s^{-1} Mpc^{-1}.
Eigenvector 1: An Optimal Correlation Space for Active Galactic Nuclei
3 Pith papers cite this work. Polarity classification is still indexing.
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Pith papers citing it
abstract
We identify a correlation space involving optical and UV emission line parameters as well as the soft X-ray spectral index that provides optimal discrimination between all principal classes of active galactic nuclei. Most of the sources in our three high quality data samples show a strong intercorrelation with narrow line Seyfert 1 (NLSy1) galaxies and steep spectrum radio galaxies occupying opposite extrema in the space. NLSy1 sources show a clear continuity with broader line sources indicating that they are not a disjoint class of AGN as is sometimes suggested. We interpret the principal intercorrelation in the parameter space as being driven by AGN luminosity to black hole mass ratio (L/M prop. to the Eddington ratio). Source orientation no doubt also plays an important role but it is not yet clear whether FWHM H beta or CIV 1549 line shift is the better indicator. We tentatively identify two RQ populations: an almost pure RQ population A with FWHM<=4000 and population B which occupies the same parameter domain as the flat spectrum RL sources. A possible interpretation sees Pop. A/NLSy1 as lower mass/high accretion rate sources and Pop. B/RL sources the opposite.
years
2026 3verdicts
UNVERDICTED 3representative citing papers
The E1/MS framework flags super-Eddington candidates in jetted gamma-ray AGN, with some showing jet-consistent radio properties and gamma-ray NLS1s showing xA spectra.
A bias-controlled quasar sample of ~2000 objects demonstrates that the X-ray-to-UV luminosity relation remains constant from redshift 0.7 to 5.
citing papers explorer
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HALO II: Constraining Hubble constant $H_{0}$ through continuum delay fitting of Fairall 9
Using simultaneous modeling of continuum lag-spectrum and broadband SED of Fairall 9 with the H0RIZON-AGN model, the authors obtain H0 = 72.4_{-3.7}^{+3.4} km s^{-1} Mpc^{-1}.
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Flagging Super-Eddington Candidates among Jetted, {\gamma}-Ray-Emitting AGN
The E1/MS framework flags super-Eddington candidates in jetted gamma-ray AGN, with some showing jet-consistent radio properties and gamma-ray NLS1s showing xA spectra.
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The X-ray-to-UV relation does not evolve in homogeneous quasar samples
A bias-controlled quasar sample of ~2000 objects demonstrates that the X-ray-to-UV luminosity relation remains constant from redshift 0.7 to 5.