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Quasi-biennial oscillations in the solar tachocline caused by magnetic Rossby wave instabilities
Sun oscillations Physical Data and Processes magnetic fields MHD—waves
2010/11/11
Quasi-biennial oscillations (QBO) are frequently observed in the solar activity indices. However, no clear physical mechanism for the observed variations has been suggested so far. Here we study the s...
Instabilities in the Gamma Ray Burst central engine. What makes the jet variable?
High Energy Astrophysical Phenomena (astro-ph.HE)
2010/12/24
Both types of long and short gamma ray bursts involve a stage of a hyper-Eddington accretion of hot and dense plasma torus onto a newly born black hole. The prompt gamma ray emission originates in jet...
Probing the accretion disk - jet connection via instabilities in the inner accretion flow. From microquasars to quasars
High Energy Astrophysical Phenomena (astro-ph.HE)
2010/12/24
We present various instability mechanisms in the accreting black hole systems which might indicate at the connection between the accretion disk and jet. The jets observed in microquasars can have a pe...