• Corpus ID: 239009513

Chirality in Astrophysics

@inproceedings{Brandenburg2021ChiralityIA,
  title={Chirality in Astrophysics},
  author={Axel Brandenburg},
  year={2021}
}
Chirality, or handedness, enters astrophysics in three distinct ways. Magnetic field and vortex lines tend to be helical and have a systematic twist in the northern and southern hemispheres of a star or a galaxy. Helicity is here driven by external factors. Chirality can also enter at the microphysical level and can then be traced back to the paritybreaking weak force. Finally, chirality can arise spontaneously, but this requires not only the presence of an instability, but also the action of… 

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SHOWING 1-10 OF 103 REFERENCES
The turbulent chiral-magnetic cascade in the early universe
The presence of asymmetry between fermions of opposite handedness in plasmas of relativistic particles can lead to exponential growth of a helical magnetic field via a small-scale chiral dynamo
Primordial Magnetic Fields, Right Electrons, and the Abelian Anomaly
In the standard model there are charges with abelian anomaly only (e.g. right-handed electron number) which are effectively conserved in the early universe until some time shortly before the
Estimate of the primordial magnetic field helicity.
TLDR
It is argued that changes in the non-Abelian Chern-Simons number generate a primordial magnetic field with left-handed helicity, and it is found that the field strength at recombination is approximately 10(-13) G on a comoving coherence scale approximately 0.1 pc.
Search for CP violating signature of intergalactic magnetic helicity in the gamma-ray sky
The existence of a cosmological magnetic field could be revealed by the effects of non-trivial helicity on large scales. We evaluate a CP (conjugation plus parity) odd statistic, Q ,u sing gamma-ray
Spontaneous chiral symmetry breaking by hydromagnetic buoyancy.
TLDR
Evidence for the parity-breaking nature of the magnetic buoyancy instability in a stably stratified gas appears to be the first of its kind and has properties similar to those in chiral symmetry breaking in biochemistry.
Magnetohydrodynamics of Chiral Relativistic Fluids
We study the dynamics of a plasma of charged relativistic fermions at very high temperature T >> m, where m is the fermion mass, coupled to the electromagnetic field. In particular, we derive a
Self-consistent evolution of magnetic fields and chiral asymmetry in the early universe.
TLDR
It is shown that the evolution of magnetic fields in a primordial plasma, filled with standard model particles at temperatures T≳10 MeV, is strongly affected by the chiral anomaly, which may strongly affect many processes in the early Universe.
Laminar and turbulent dynamos in chiral magnetohydrodynamics-I: Theory
The magnetohydrodynamic (MHD) description of plasmas with relativistic particles necessarily includes an additional new field, the chiral chemical potential associated with the axial charge (i.e.,
Simulations of galactic dynamos
We review our current understanding of galactic dynamo theory, paying particular attention to numerical simulations both of the mean-field equations and the original three-dimensional equations
A Global Two-scale Helicity Proxy from π-ambiguous Solar Magnetic Fields
If the alpha effect plays a role in the generation of the Sun's magnetic field, the field should show evidence of magnetic helicity of opposite signs at large and small length scales. Measuring this
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