4 papers
Explaining the spectrum from the Galactic Centre using a two temperature plasma
Rohan Mahadevan
The radio source Sagittarius A* (Sgr A*), is thought to be a supermassive black hole located at the centre of our Galaxy, that is accreting gas from the surrounding region. Using t…
Advection-Dominated Accretion around Black Holes
Ramesh Narayan, Rohan Mahadevan, Eliot Quataert
This article reviews the physics of advection-dominated accretion flows (ADAFs) and describes applications to several black hole X-ray binaries and galactic nuclei. The possibility…
Cyclo-Synchrotron Emission and Comptonization in Optically Thin Hot Accretion Flows
Rohan Mahadevan
Soft cyclo-synchrotron photons produced by thermal electrons moving in a magnetic field can be subsequently Comptonized to produce hard X-ray and -ray emission. An accurate dete…
Advection-Dominated Accretion Model for Sagittarius A: Evidence for a $10^6\msun$ Black Hole at the Galactic Center
Ramesh Narayan, Insu Yi, Rohan Mahadevan
The enigmatic radio source Sagittarius A* at the centre of our Galaxy appears to be a low-luminosity version of active galactic nuclei in other galaxies. By analogy with active gal…