Non-Gaussianity and excursion set theory: Halo bias

Peter Adshead; Eric J. Baxter; Scott Dodelson; Adam Lidz

doi:10.1103/PhysRevD.86.063526

Non-Gaussianity and excursion set theory: Halo bias

Peter Adshead, Eric J. Baxter, Scott Dodelson, Adam Lidz

Research output: Contribution to journal › Article › peer-review

Abstract

We study the impact of primordial non-Gaussianity generated during inflation on the bias of halos using excursion set theory. We recapture the familiar result that the bias scales as k ^-2 on large scales for local type non-Gaussianity but explicitly identify the approximations that go into this conclusion and the corrections to it. We solve the more complicated problem of nonspherical halos, for which the collapse threshold is scale-dependent.

Original language	English (US)
Article number	063526
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	86
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevD.86.063526
State	Published - Sep 24 2012
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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10.1103/PhysRevD.86.063526

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Non-Gaussianity and excursion set theory: Halo bias

Abstract

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