Licia Verde and Sabino Matarrese 2009 ApJ 706 L91 doi:10.1088/0004-637X/706/1/L91
Licia Verde1,2 and Sabino Matarrese3
Show affiliationsWe 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.
galaxies: clusters: general; galaxies: halos; large-scale structure of universe
Issue 1 (2009 November 20)
Received 2009 September 21, accepted for publication 2009 October 14
Published 2009 November 2
Licia Verde and Sabino Matarrese 2009 ApJ 706 L91
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