Lecture 16: Winds, Jets and Outflows
Lecture 16: Winds, Jets and Outflows
Lecture 16: Winds, Jets and Outflows
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Magnetospheric accretionFree-fall <strong>and</strong> accretion shockFrom r A down to star: matteris in supersonic free-fall.Accretion shockFree-fallregionNear the star the matter getsto a halt in a st<strong>and</strong>-off shock.r iShock velocity:v s=2GM 1− r *r *r iDissipated energy (=accretion luminosity from shock):⎛⎛L€accr= 1− r ⎞⎞*⎜⎜ ⎟⎟ G M ˙ M⎝⎝ ⎠⎠r ir *