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6 papers · 2 filters
On the Detection of Magnetic Helicity
Tina Kahniashvili, Tanmay Vachaspati
Magnetic fields in various astrophysical settings may be helical and, in the cosmological context, may provide a measure of primordial CP violation during baryogenesis. Yet it is d…
Effects of Cosmological Magnetic Helicity on the CMB
Tina Kahniashvili
In this talk I present a short review of primordial magnetic helicity effects on Cosmic Microwave Background (CMB) temperature and polarization anisotropies. These effects allow us…
Gravitational Radiation from Primordial Helical Turbulence
Tina Kahniashvili
In present talk I show that primordial helical turbulence produced during a first-order phase transition induces circularly polarized cosmological gravitational waves (GWs). The de…
Polarized Cosmological Gravitational Waves from Primordial Helical Turbulence
Tina Kahniashvili, Grigol Gogoberidze, Bharat Ratra +1
We show that helical turbulence produced during a first-order phase transition generates circularly polarized cosmological gravitational waves (GWs). The characteristic frequency o…
Effects of Cosmological Magnetic Helicity on the Cosmic Microwave Background
Tina Kahniashvili, Bharat Ratra, ;
Cosmological magnetic fields induce temperature and polarization fluctuations in the cosmic microwave background (CMB) radiation. A cosmological magnetic field with current amplitu…
Neutrino Mass Limit from Galaxy Cluster Number Density Evolution
Tina Kahniashvili, Eckhard von Toerne, Natalia A. Arhipova +1
Measurements of the evolution with redshift of the number density of massive galaxy clusters are used to constrain the energy density of massive neutrinos and so the sum of neutrin…