16 May 2002 CfA Colloquium


Title: Black Holes and the Power of Jets

Speaker: Heino Falcke Roberto Gilmozzi

Abstract: The removal of energy and angular momentum through expulsion of fast, sometimes relativistic, bipolar plasma jets from the inner region of accretion flows around black holes seems to be a universal phenomenon found across the astrophysical spectrum: from supermassive black holes in AGN down to stellar mass X-ray binaries. The power of jets seems to scale with the amount of gravitational energy released through the accretion of matter onto the compact object. This permits a self-similar treatment of jets over many orders of magnitude. Modeling the emission of relativistic jets, from radio to X-rays is, crucial for understanding the total radiation spectrum and energy output of black holes. I specifically discuss the case of BL Lacs, X-ray binaries and low-luminosity AGN (LLAGN) - such as the supermassive black hole at the center of our own Galaxy - and how they are related.

References for students:

Useful references of review articles from Falcke webpage

``Blazars in Low-Luminosity and Radio-Weak AGN?'' (invited) Falcke H., Markoff S., Biermann P.L. 2001, in "Blazar Demographics and Physics", ASP Conf. Ser. Vol. 227, Eds. P. Padovani & M.C. Urry, p. 56

``The Supermassive Black Hole at the Galactic Center'' (review) Melia F., Falcke H. 2001, Annu. Rev. Astron. Astrophys., Vol. 39, 309-352

``The Silent Majority - Jets and Radio Cores from Low-Luminosity Black Holes'' (Ludwig-Biermann-Prize lecture) Falcke H. 2001, in: "Dynamic Stability and Instabilities in the Universe", Reviews in Modern Astronomy, Vol. 14, R.E. Schielicke (Ed.), Astronomische Gesellschaft, Hamburg, p.15-51