622 citations · 7.3k across the 65 of their papers we have counts for
6 papers · 2 filters
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…
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…
Measuring Black Hole Spin by the Continuum-Fitting Method: Effect of Deviations from the Novikov-Thorne Disc Model
Akshay K. Kulkarni, Robert F. Penna, Roman V. Shcherbakov +7
The X-ray spectra of accretion discs of eight stellar-mass black holes have been analyzed to date using the thermal continuum fitting method, and the spectral fits have been used t…
Measuring the Spins of Accreting Black Holes
Jeffrey E. McClintock, Ramesh Narayan, Shane W. Davis +6
A typical galaxy is thought to contain tens of millions of stellar-mass black holes, the collapsed remnants of once massive stars, and a single nuclear supermassive black hole. Bot…