Jet Emitting Discs: a New Accretion Flow Solution

J. Ferreira, P. O. Petrucci, G. Murphy, C. Zanni, G. Henri

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

We present a model where the innermost regions of accretion discs around AGN are pervaded by a large scale magnetic field of bipolar topology. It will be shown that once this field becomes large enough, a new class of accretion flow sets in where a sizable fraction of the released accretion power feeds two self-collimated jets. Such a Jet Emitting Disc has dynamical properties quite different from both the standard and advection dominated discs. It also exhibits three different thermal equilibrium branches at a given radius: two stable (cold and hot) and one intermediate unstable. The hot solution has been for instance successfully applied to the Low/Hard states of microquasars.These results pinpoint the fact that a global understanding of accretion modes around compact objects requires to reinvestigate the issue of field advection in turbulent, magnetized disks.
Original languageEnglish
Title of host publicationProceedings of Accretion and Ejection in AGN: a Global View
Editors Laura Maraschi, Gabriele Ghisellini, Roberto Della Ceca, Fabrizio Tavecchio
Volume427
Publication date2010
Pages49-55
Publication statusPublished - 2010
Externally publishedYes

Cite this

Ferreira, J., Petrucci, P. O., Murphy, G., Zanni, C., & Henri, G. (2010). Jet Emitting Discs: a New Accretion Flow Solution. In L. Maraschi, G. Ghisellini, R. Della Ceca, & F. Tavecchio (Eds.), Proceedings of Accretion and Ejection in AGN: a Global View (Vol. 427, pp. 49-55) http://adsabs.harvard.edu/full/2010ASPC..427...49F