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Signatures of anisotropic sources in the trispectrum of the cosmic microwave background
Maresuke Shiraishi, Eiichiro Komatsu, Marco Peloso
Soft limits of -point correlation functions, in which one wavenumber is much smaller than the others, play a special role in constraining the physics of inflation. Anisotropic s…
Polarization bispectrum for measuring primordial magnetic fields
Maresuke Shiraishi
We examine the potential of polarization bispectra of the cosmic microwave background (CMB) to constrain primordial magnetic fields (PMFs). We compute all possible bispectra betwee…
First observational constraints on tensor non-Gaussianity sourced by primordial magnetic fields from cosmic microwave background
Maresuke Shiraishi, Toyokazu Sekiguchi
Primordial magnetic fields (PMFs) create a large squeezed-type non-Gaussianity in tensor perturbation, which generates non-Gaussian temperature fluctuations in the cosmic microwave…
Generation of magnetic fields in Einstein-Aether gravity
Shohei Saga, Maresuke Shiraishi, Kiyotomo Ichiki +1
Recently the lower bounds of the intergalactic magnetic fields Gauss are set by gamma-ray observations while it is unlikely to generate such large scale ma…
Signatures of anisotropic sources in the squeezed-limit bispectrum of the cosmic microwave background
Maresuke Shiraishi, Eiichiro Komatsu, Marco Peloso +1
The bispectrum of primordial curvature perturbations in the squeezed configuration, in which one wavenumber, , is much smaller than the other two, , pla…
Scale-dependent bias due to primordial vector fields
Maresuke Shiraishi, Shuichiro Yokoyama, Kiyotomo Ichiki +1
Anisotropic stress perturbations induced by primordial Gaussian vector fields create non-Gaussianity in curvature perturbations. We found that such non-Gaussianity closely resemble…