622 citations · 7.3k across the 65 of their papers we have counts for
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A Comment on the Radiative Efficiency of AGN
Ari Laor, Shane Davis
A recent study of the accretion efficiency of the PG sample AGN, based on the thin accretion disk emission model, finds the accretion radiative efficiency is correlated with the bl…
Intrinsic disc emission and the Soft X-ray Excess in AGN
Chris Done, Shane Davis, Chichuan Jin +2
(Abridged) Narrow Line Seyfert 1 (NLS1) galaxies have low mass black holes and mass accretion rates close to (or exceeding) Eddington, so a standard blackbody accretion disc should…
Cold Accretion Disks and Lineless Quasars
Ari Laor, Shane W. Davis
The optical-UV continuum of quasars is broadly consistent with the emission from a geometrically thin optically thick accretion disk (AD). The AD produces the ionizing continuum wh…
The Extreme Spin of the Black Hole in Cygnus X-1
Lijun Gou, Jeffrey E. McClintock, Mark J. Reid +7
The compact primary in the X-ray binary Cygnus X-1 was the first black hole to be established via dynamical observations. We have recently determined accurate values for its mass a…
The Cool Accretion Disk in ESO 243-49 HLX-1: Further Evidence of an Intermediate Mass Black Hole
Shane W. Davis, Ramesh Narayan, Yucong Zhu +5
With an inferred bolometric luminosity exceeding 10^42 erg/s, HLX-1 in ESO 243-49 is the most luminous of ultraluminous X-ray sources and provides one of the strongest cases for th…
The X-Ray Polarization Signature of Quiescent Magnetars: Effect of Magnetospheric Scattering and Vacuum Polarization
Rodrigo Fernández, Shane W. Davis
In the magnetar model, the quiescent non-thermal soft X-ray emission from Anomalous X-ray Pulsars and Soft-Gamma Repeaters is thought to arise from resonant comptonization of therm…