Non-Gaussianity and Excursion Set Theory: Halo Bias
Cosmology and Nongalactic Astrophysics
2012-09-28 v2 General Relativity and Quantum Cosmology
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 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 non-spherical halos, for which the collapse threshold is scale dependent.
Keywords
Cite
@article{arxiv.1206.3306,
title = {Non-Gaussianity and Excursion Set Theory: Halo Bias},
author = {Peter Adshead and Eric J. Baxter and Scott Dodelson and Adam Lidz},
journal= {arXiv preprint arXiv:1206.3306},
year = {2012}
}
Comments
13 pages, 3 figures. v2 references added. Matches published version