Primordial magnetic helicity effects on the CMB and detection prospects
by
Tina Kahniashvili(Carnegie Mellon University (USA) & Ilia State University (Georgia))
→
Europe/Stockholm
122:026
122:026
Description
Magnetic helicity is a manifestation of parity symmetry violation. While
the level of parity violation
observed in fundamental physical interactions is small, parity violation
is widespread in various astrophysical systems
with significant magnetic dynamics, such as one-sided jets from active
galactic nuclei and helical magnetic fields in the solar magnetosphere.
Helical magnetic fields can be generated during the electroweak phase
transition or during inflation. Such a helical cosmological magnetic field
might be the source of magnetic helicity needed in galactic dynamo
amplification models. I will discuss the magnetic helicity effects on the
CMB fluctuations, current limits from the CMB data, and future detection
prospects.
