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Parity-violating and anisotropic correlations in pseudoscalar inflation
Nicola Bartolo, Sabino Matarrese, Marco Peloso +1
A pseudo-scalar inflaton field can have interesting phenomenological signatures associated with parity violation. The existing analyses of these signatures typically assume statist…
Observed parity-odd CMB temperature bispectrum
Maresuke Shiraishi, Michele Liguori, James R. Fergusson
Parity-odd non-Gaussianities create a variety of temperature bispectra in the cosmic microwave background (CMB), defined in the domain: . Thes…
Constraining primordial vector mode from B-mode polarization
Shohei Saga, Maresuke Shiraishi, Kiyotomo Ichiki
The B-mode polarization spectrum of the Cosmic Microwave Background (CMB) may be the smoking gun of not only the primordial tensor mode but also of the primordial vector mode. If t…
General parity-odd CMB bispectrum estimation
Maresuke Shiraishi, Michele Liguori, James R. Fergusson
We develop a methodology for estimating parity-odd bispectra in the cosmic microwave background (CMB). This is achieved through the extension of the original separable modal method…
21cm fluctuations from primordial magnetic fields
Maresuke Shiraishi, Hiroyuki Tashiro, Kiyotomo Ichiki
Recent observations of magnetic fields in intergalactic void regions and in high redshift galaxies may indicate that large scale magnetic fields have a primordial origin. If primor…
CMB statistical anisotropy from noncommutative gravitational waves
Maresuke Shiraishi, David F. Mota, Angelo Ricciardone +1
Primordial statistical anisotropy is a key indicator to investigate early Universe models and has been probed by the cosmic microwave background (CMB) anisotropies. In this paper,…