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Jet Power and Black Hole Spin: Testing an Empirical Relationship and Using it to Predict the Spins of Six Black Holes
James F. Steiner, Jeffrey E. McClintock, Ramesh Narayan
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 (2012)…
The Shakura-Sunyaev Viscosity Prescription with Variable alpha(r)
Robert F. Penna, Aleksander Sadowski, Akshay K. Kulkarni +1
Almost all hydrodynamic accretion disk models parametrize viscosity with the dimensionless parameter alpha. There is no detailed model for alpha, so it is usually taken to be a con…
GRMHD Simulations of Magnetized Advection Dominated Accretion on a Non-Spinning Black Hole: Role of Outflows
Ramesh Narayan, Aleksander Sadowski, Robert F. Penna +1
We present results from two long-duration GRMHD simulations of advection-dominated accretion around a non-spinning black hole. The first simulation was designed to avoid significan…
General Relativistic Modeling of Magnetized Jets from Accreting Black Holes
Alexander Tchekhovskoy, Jonathan C. McKinney, Ramesh Narayan
Recent advances in general relativistic magnetohydrodynamic modeling of jets offer unprecedented insights into the inner workings of accreting black holes that power the jets in ac…
The Eye of the Storm: Light from the Inner Plunging Region of Black Hole Accretion Discs
Yucong Zhu, Shane W. Davis, Ramesh Narayan +3
It is generally thought that the light coming from the inner plunging region of black hole accretion discs contributes negligibly to the disc's overall spectrum, i.e. the plunging…
On the Mass Distribution and Birth Masses of Neutron Stars
Feryal Ozel, Dimitrios Psaltis, Ramesh Narayan +1
We investigate the distribution of neutron star masses in different populations of binaries, employing Bayesian statistical techniques. In particular, we explore the differences in…