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A New Dynamical Model for the Black Hole Binary Lmc X-1
(IOP Publishing, 2009)
We present a dynamical model of the high mass X-ray binary LMC X-1 based on high-resolution optical spectroscopy and extensive optical and nearinfrared photometry. From our new optical data we find an orbital period of P ...
Confirmation via the Continuum-Fitting Method That the Spin of the Black Hole in Cygnus X-1 Is Extreme
(IOP Publishing, 2014)
In Gou et al., we reported that the black hole primary in the X-ray binary Cygnus X-1 is a near-extreme Kerr black hole with a spin parameter a∗ > 0.95 (3σ). We confirm this result while setting a new and more stringent ...
A High-Frequency Doppler Feature in the Power Spectra of Simulated Grmhd Black Hole Accretion Disks
(IOP Publishing, 2014)
Black hole binaries exhibit a wide range of variability phenomena, from large-scale state changes to broadband noise and quasi-periodic oscillations, but the physical nature of much of this variability is poorly understood. ...
Erratum: "Precise Measurement of the Spin Parameter of the Stellar-Mass Black hole M33 X-7” (2008, ApJ, 679, L37)
(IOP Publishing, 2010)
In prior work, Chandra and Gemini-North observations of the eclipsing X-ray binary M33 X-7 have yielded measurements of the mass of its black hole primary and the system’s orbital inclination angle of unprecedented accuracy. ...
Jet Power and Black Hole Spin: Testing an Empirical Relationship and Using It to Predict the Spins of Six Black Holes
(IOP Publishing, 2012)
Using 5 GHz radio luminosity at light-curve maximum as a proxy for jet power and black hole spin measurements obtained via the continuum-fitting method, Narayan & McClintock presented the first direct evidence for a ...
Inferring the Inclination of a Black Hole Accretion Disk From Observations of Its Polarized Continuum Radiation
(IOP Publishing, 2009)
Spin parameters of stellar-mass black holes in X-ray binaries are currently being estimated by fitting the X-ray continuum spectra of their accretion disk emission. For this method, it is necessary to know the inclination ...
Three-Dimensional Simulations of Magnetized Thin Accretion Disks around Black Holes: Stress in the Plunging Region
(IOP Publishing, 2008)
We describe three-dimensional general relativistic magnetohydrodynamic simulations of a geometrically thin accretion disk around a nonspinning black hole. The disk has a thickness over the radial range h/r ∼ 0.05–0.1. In ...