DETECTABILITY OF THE EFFECT OF INFLATIONARY NON-GAUSSIANITY ON HALO BIAS
Journal Article
·
· Astrophysical Journal (Online)
- ICREA: Institucio Catalana de Recerca i Estudis Avancat and Instituto de Ciencias del Cosmos (ICC) Universidad de Barcelona, Marti i Franques 1, 08028 Barcelona (Spain)
- Dipartimento di fisica 'G. Galilei', Universita degli Studi di Padova and INFN, Sezione di Padova, via Marzolo 8, 35131, Padova (Italy)
We consider the description of the clustering of halos for physically motivated types of non-Gaussian initial conditions. In particular, we include non-Gaussianity of the type arising from single-field slow roll, multifields, curvaton (local type), higher-order derivative type (equilateral), vacuum-state modifications (enfolded type), and horizon-scale GR corrections type. We show that large-scale halo bias is a very sensitive tool for probing non-Gaussianity, potentially leading, for some planned surveys, to a detection of non-Gaussianity arising from horizon-scale GR corrections. In tandem with cosmic microwave background constraints, the halo bias approach can help enormously to discriminate among different shapes of non-Gaussianity and thus among models for the origin of cosmological perturbations.
- OSTI ID:
- 21378190
- Journal Information:
- Astrophysical Journal (Online), Journal Name: Astrophysical Journal (Online) Journal Issue: 1 Vol. 706; ISSN 1538-4357
- Country of Publication:
- United States
- Language:
- English
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