Understanding the Gaussianity of the Primordial Universe
A special issue of Galaxies (ISSN 2075-4434).
Deadline for manuscript submissions: closed (31 August 2018) | Viewed by 392
Special Issue Editor
Interests: theoretical and observational cosmology; dark energy; dark matter; modified gravity; primordial non-Gaussianity; relativistic corrections to cosmological observables; weak lensing; galaxy clustering; neutral hydrogen intensity mapping; Euclid; SKA; multi-wavelength synergies
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Special Issue Information
Dear Colleagues,
Assessing the Gaussianity of primordial cosmological perturbations has been an open issue over the last few decades. On the theoretical level, primordial non-Gaussianity is a key feature of most inflationary scenarios, and it has been argued that non-detectability of non-Gaussianity is the only means of falsifying inflation. Currently, the tightest available constraints on primordial non-Gaussianity come from bounds on higher-order correlation functions of anisotropies in the cosmic microwave background radiation. However, only non-Gaussianity of the local type is tightly constrained, whereas a vast parameter space for other kinds of non-Gaussianity is still allowed by data. For this reason, future cosmological experiments plan to address this issue with a variety of techniques and carrying out observations all across the electromagnetic spectrum.
This Special Issue of Galaxies is intended to review the development of both our theoretical understanding of non-Gaussianity and the observational effort aimed at its measurement. We would like to call for papers that either enlighten the mechanisms by which non-Gaussianity may arise and manifest in the early Universe, or put bounds on the level of non-Gaussianity allowed by currently available data, or forecast the constraining power of upcoming cosmological experiments. Review papers are also most welcome.
Dr. Stefano CameraGuest Editor
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Keywords
- primordial non-Gaussianity
- inflation
- cosmic large-scale structure
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