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Unified schemes for active galaxies: a clue from the missing Fanaroff-Riley type I quasar population
Heino Falcke, Gopal-Krishna, Peter L. Biermann
We link the lack of FR I type structure among quasars to the void of radio loud quasars below a critical disk luminosity of ~10^46 erg/sec in the PG sample. We argue that the openi…
The jet-disk symbiosis. II. Interpreting the Radio/UV correlations in quasars
Heino Falcke, Matthew A. Malkan, Peter L. Biermann
We investigate the correlation between the accretion disk (UV) luminosity and the radio core emission of a quasar sample. In a radio/ plot we find the quasars to be s…
The jet-disk symbiosis. I. Radio to X-ray emission models for quasars
Heino Falcke, Peter L. Biermann
Starting from the assumption that radio jets and accretion disks are symbiotic features present in radio loud and radio quiet quasars we scale the bulk power of radio jets with the…
WHAT IS SGR A*? The Starved Black Hole in the Center of the Milky Way
Heino Falcke
Sgr A* is the unique 1 Jy flat spectrum radio point source located at the dynamical center of the Galaxy and in the very center of the central star cluster. Due to its unusual appe…
Starving Accretion Disks in the Center of Galaxies: the Examples of Sgr A* and M31
H. Falcke, O. M. Heinrich
The low accretion rate inferred for the GC source Sgr A* requires a distinct type of accretion disk -- a starving disk. We investigate the structure of this type of disk within the…