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An X‐Ray, Infrared, and Submillimeter Flare of Sagittarius A*
(American Astronomical Society, 2008)
Energetic flares are observed in the Galactic supermassive black hole Sagittarius A* from radio to X-ray wavelengths. On a few occasions, simultaneous flares have been detected in IR and X-ray observations, but clear ...
The slimming effect of advection on black-hole accretion flows
(EDP Sciences, 2016)
We study energy flows in geometrically thick accretion discs, both optically thick and thin, using general relativistic, three-dimensional simulations of black hole accretion flows. We find that for non-rotating black holes ...
A Parallax Distance to the Microquasar Grs 1915+105 and a Revised Estimate of Its Black Hole Mass
(IOP Publishing, 2014)
Using the Very Long Baseline Array, we have measured a trigonometric parallax for the microquasar GRS 1915+105, which contains a black hole and a K-giant companion. This yields a direct distance estimate of 8.6 +2.0 −1.6 ...
The Black Hole Mass Distribution in the Galaxy
(IOP Publishing, 2010)
We use dynamical mass measurements of 16 black holes in transient low-mass X-ray binaries to infer the stellar black hole mass distribution in the parent population. We find that the observations are best described by a ...
The constant inner-disk radius of LMC X-3: A basis for measuring black hole spin
(IOP Publishing, 2010)
he black hole binary system LMC X-3 has been observed by virtually every X-ray mission since the inception of X-ray astronomy. Among the persistent sources, LMC X-3 is uniquely both habitually soft and highly variable. ...
Three-dimensional general relativistic radiation magnetohydrodynamical simulation of super-Eddington accretion, using a new code HARMRAD with M1 closure
(Oxford University Press (OUP), 2014)
Black hole (BH) accretion flows and jets are dynamic hot relativistic magnetized plasma flows whose radiative opacity can significantly affect flow structure and behavior. We describe a numerical scheme, tests, and an ...
HERO - A 3D general relativistic radiative post-processor for accretion discs around black holes
(Oxford University Press (OUP), 2015)
HERO (Hybrid Evaluator for Radiative Objects) is a 3D general relativistic radiative transfer code which has been tailored to the problem of analyzing radiation from simulations of relativistic accretion discs around black ...
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 ...
A Simplified Global Solution for an Advection‐dominated Accretion Flow
(IOP Publishing, 2008)
When we model black hole accretion sources such as active galactic nuclei and black hole X-ray binaries as advection dominated accretion flows (ADAFs), it is necessary to use the global solution to the equations rather ...
Radio Crickets: Chirping Jets from Black Hole Binaries Entering their Gravitational Wave Inspiral
(Oxford University Press (OUP), 2016)
We study a novel electromagnetic signature of supermassive black hole binaries whose inspiral starts being dominated by gravitational wave (GW) emission. Recent simulations suggest that the binary's member BHs can continue ...