The Whole Enchilada : Magnetized Hypersonic Radiative MHD Jets in Laboratory Astrophysical Studies

Details The Whole Enchilada : Magnetized Hypersonic Radiative MHD Jets in Laboratory Astrophysical Studies The Whole Enchilada : Magnetized Hypersonic Radiative MHD Jets in Laboratory Astrophysical Studies

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...212.0335f&link_type=abstract

American Astronomical Society, AAS Meeting #212, #3.35; Bulletin of the American Astronomical Society, Vol. 40, p.190

Astronomy and Astrophysics

Astrophysics

Scientific paper

Collimated outflows (jets) are ubiquitous in astrophysics appearing around sources as diverse as newly formed stars and extragalactic supermassive blackholes. In all cases these jets are believed to be launched from magnetized accretion disks surrounding a central gravitating source. Understanding astrophysical outflows/jets requires fully three-dimensional dynamical studies of hypersonic plasmas and their threaded magnetic fields. Experimental high-energy density plasma facilities can now produce macroscopic volumes of plasma under astrophysically relevant conditions and can therefore shed new light on outflows/jets. Here we present new experiments that, for the first time, directly address magnetized astrophysical jets. Our experiments explore the propagation and stability of super-magnetosonic, radiatively cooled, and magnetically dominated bubbles with internal narrow jets. The results are scalable to astrophysical environments via the similarity of dimensionless numbers controlling the dynamics in both settings. Our studies suggest that outflows/jets may be intrinsically episodic with instabilities leading not to disruption of jets but instead to re-arrangement into highly-collimated distributions of clumps.

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