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Constraining graviton non-Gaussianity through the CMB bispectra
Valerio De Luca, Gabriele Franciolini, Alex Kehagias +2
Tensor non-Gaussianities are a key ingredient to test the symmetries and the presence of higher spin fields during the inflationary epoch. Indeed, the shape of the three point corr…
Super-sample tidal modes on the celestial sphere
Kazuyuki Akitsu, Naonori S. Sugiyama, Maresuke Shiraishi
The super-sample tidal effect carries information on long-wavelength fluctuations that we cannot measure directly. It arises from the mode-coupling between short-wavelength and lon…
Planck 2018 results. IX. Constraints on primordial non-Gaussianity
Planck Collaboration, Y. Akrami, F. Arroja +157
We analyse the Planck full-mission cosmic microwave background (CMB) temperature and E-mode polarization maps to obtain constraints on primordial non-Gaussianity (NG). We compare e…
Tensor Non-Gaussianity Search: Current Status and Future Prospects
Maresuke Shiraishi
Primordial gravitational waves (GWs) are said to be a smoking gun in cosmic inflation, while, even if they are detected, the specification of their origins are still required for e…
General modal estimation for cross-bispectra
Maresuke Shiraishi, Michele Liguori, James R. Fergusson +1
We describe a fast, optimal estimator for measuring angular bispectra between two correlated weakly non-Gaussian fields ( and ) from observational datasets, based on a separa…