[GTP] Joint GTP-HAO seminar, June 1

[Silvia Gentile]

Joint GTP - HAO Special Seminar
Breakdown of Parity in Hydromagnetic Instabilities
Dhrubaditya Mitra
NORDITA, Sweden


Evidence for a parity-breaking nature of the magnetic buoyancy 
instability in a stably stratified gas is reported.
Such instabilities are expected to play important role in possible 
emergence of magnetic fluxtubes giving rise to observed magnetic 
behavior of the sun.
In the absence of rotation, no helicity is produced, but the non-helical 
state is found to be unstable to small helical perturbations during the 
development of the instability. The parity-breaking nature of an 
instability in magnetohydrodynamics appears to be the first of its kind 
and is similar to chiral symmetry breaking in biochemistry.
Such parity breaking nature may be universal in certain class of 
hydromagnetic instabilities.
Possible Ginzburg-Landau theory of such instabilities will also be 
discussed.

Ref :
[1] Spontaneous chiral parity breaking by hydromagnetic buoyancy 
(http://arxiv.org/abs/1011.1251v1)
Piyali Chatterjee, Dhrubaditya Mitra, Axel Brandenburg, Matthias Rheinhardt
[2] Alpha effect due to buoyancy instability of a magnetic layer 
(http://arxiv.org/abs/1011.1218v1)
Piyali Chatterjee, Dhrubaditya Mitra, Matthias Rheinhardt, Axel Brandenburg


Wednesday, June 1, 2011
Center Green Laboratory 1, North Auditorium
Lecture at 11:00 am

-- 
Silvia Gentile
NCAR IMAGe
1850 Table Mesa Drive
Boulder, CO 803035
www2.image.ucar.edu/IMAGe