Non-Gaussianity and excursion set theory: Halo bias

被引：19

作者：

Adshead, Peter ^{[1
]}

Baxter, Eric J. ^{[2
]}

Dodelson, Scott ^{[1
,2
,3
]}

Lidz, Adam ^{[4
]}

机构：

[1] Univ Chicago, Enrico Fermi Inst, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA

[2] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA

[3] Fermilab Natl Accelerator Lab, Fermilab Ctr Particle Astrophys, Batavia, IL 60510 USA

[4] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA

来源：

PHYSICAL REVIEW D | 2012年 / 86卷 / 06期

基金：

美国国家科学基金会;

关键词：

MASS FUNCTION; ELLIPSOIDAL COLLAPSE; MODEL; BARRIERS;

D O I：

10.1103/PhysRevD.86.063526

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：13

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