Jets

[ispom]

Why do some celestial objects develop jets ?

it is amazing that jets were discovered at a so large diversity of celestial bodies,
from the supermassive black holes over tiny neutron stars and now also at only 24 Jupitermasses brown dwarf 2MASS1207-3932.

http://www.eso.org/public/outreach/press-rel/pr-2007/pr-24-07.html


It is still more amazing that no satisfying explanation was found for the origin of jets. The general reference to magnetic fields lets arise the question:
why then not also with our sun or comparable stars?
Magnetic fields play also for our sun and comparable stars a considerable role, why do they not have jets too?
(would look certainly beautiful :) )

[freespace]

I would wger the magnetic fields of these objects are not only coherent, but also extremely powerful compare to what we see in the Sun. Not only that, the particles involved would be much more energetic too.

The force on a charged particle is the cross product of the magnetic field and the direction of trave times its charge. The sun might have a similar magnetic field, but with out highly energetic particles we won't really see any jets.

I would argue the Sun does have jets, just none of them are so big and the curve back. We call them solar flares.

[ballaratdragons]

Maybe Jets have something to do with speed of rotation :shrug:

The faster an object spins, the better the jet? Maybe.

[ispom]

I have now consult a German astrophysics encyclopedia

http://www.mpe.mpg.de/~amueller/lexdt.html (http://www.mpe.mpg.de/~amueller/lexdt.html)


Jets are only possible, where an accretion disc is too

and our Sun has no such one fortunately :lol: