Magnetically Dominated Accretion Flows (MDAFS) and Jet Production in the Lowhard State |
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| Authors: | David L Meier |
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| Institution: | (1) Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA |
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| Abstract: | In this paper I propose that the inner part of a black hole accretion inflow (< 100 rg) may enter a magnetically dominated, magnetosphere-like phase in which the strong, well-ordered fields play a more important
role than weak, turbulent fields. In the low/hard state this flow is interior to the standard ADAF usually invoked to explain
the observed hot, optically thin emission. Preliminary solutions for these new MDAFs are presented.
Time-dependent X-ray and radio observations give considerable insight into these processes, and a new interpretation of the
X-ray power spectrum (as arising from many disk radii) may be in order. While an evaporative ADAF model explains the noise
power above 0.01 Hz, an inner MDAF is needed to explain the high-frequency cutoff near 1 Hz, the presence of a QPO, and the
production of a jet. The MDAF scenario also is consistent with the phenomonological models presented at this meeting by several
authors. |
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| Keywords: | black holes accretion magnetic fields jets |
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