Integrated mechanism that both removes accretion disk angular momentum and drives astrophysical jets

Speaker: 
Paul Bellan (Caltech)
Friday, May 4, 2018 - 12:15pm
Astrophysical jets are long collimated plasma columns shooting out from certain stars and always appear in pairs and are always associated with accretion disks. Critical outstanding issues are how angular momentum is removed from the material accreting to an accretion disk and why jets require existence of accretion disks. A mechanism [1,2] that simultaneously removes accretion disk angular momentum and drives astrophysical jets is proposed. The mechanism depends on the extreme difference between the governing physics in the weakly-ionized, highly collisional accretion disk and the governing physics in the completely-ionized, nearly collisionless region outside the disk.
 

[1] Bellan, P.M., Monthly Notices Royal Astronomical Society 458, 4400 (2016)

[2] Bellan, P.M., Plasma Physics and Controlled Fusion, online at https://doi.org/10.1088/1361-6587/aa85f9 (2017)