Presentation 1 : None
Accretion-Ejection Instability: making jets and QPOs
P. Varniere, M. Tagger
The Accretion-Ejection Instability (AEI) occurs in the inner
region of a disk threaded by a vertical magnetic field
of the order of equipartition with gas pressure.
This instability provides a way to connect accretion (in the inner
region of the disk) with the ejection (energy for a jet or a wind).
It is also a possible explanation for the low frequency
Quasi-Periodic Oscillation (QPO) observed in X-ray binaries.
We present new results on the modelisation of the QPO from the
instability, and on the connection to the jet via Alfven waves.