Modelling the BAO feature in bispectrum

Author:

Behera Jayashree1ORCID,Rezaie Mehdi1ORCID,Samushia Lado123,Ereza Julia4ORCID

Affiliation:

1. Department of Physics, Kansas State University , 116 Cardwell Hall, Manhattan, KS 66506 , USA

2. E. Kharadze Georgian National Astrophysical Observatory , 47/57 Kostava St, Tbilisi 0179 , Georgia

3. School of Natural Sciences and Medicine, Ilia State University , 3/5 Cholokashvili Avenue, Tbilisi 0162 , Georgia

4. Instituto de Astrofísica de Andalucía (CSIC) , Glorieta de la Astronomía, E-18080 Granada , Spain

Abstract

ABSTRACT We investigate how well a simple leading order perturbation theory model of the bispectrum can fit the baryon acoustic oscillation (BAO) feature in the measured bispectrum monopole of galaxies. Previous works showed that perturbative models of the galaxy bispectrum start failing at the wavenumbers of k ∼ 0.1 h Mpc−1. We show that when the BAO feature in the bispectrum is separated, it can be successfully modelled up to much higher wavenumbers. We validate our modelling on GLAM simulations that were run with and without the BAO feature in the initial conditions. We also quantify the amount of systematic error due to BAO template being offset from the true cosmology. We find that the systematic errors do not exceed 0.3 per cent for reasonable deviations of up to 3 per cent from the true value of the sound horizon.

Funder

National Energy Research Scientific Computing Center

U.S. Department of Energy Office of Science

Lawrence Berkeley National Laboratory

NASA

MICINN

Publisher

Oxford University Press (OUP)

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3