Bayesian model selection with future 21cm observations of the epoch of reionization
Bayesian model selection with future 21cm observations of the epoch of reionization
复制标题
贝叶斯模型选择与再电离时代未来 21cm 观测
DOI:
10.1093/mnras/stz1297
复制
发表时间:
2019
影响因子:
4.8
通讯作者:
Binnie T
中科院分区:
文献类型:
--
作者:
Binnie T
We apply Bayesian statistics to perform model selection on different reionization scenarios via theMultinestalgorithm. Initially, we recover the results shown by21cmmcfor the parameter estimation of21cmFASTmodels. We proceed to test several toy models of the epoch of reionization defined in contrasting morphology and scale. We find that LOFAR observations are unlikely to allow model selection even with long integration times. HERA would require 61 dipoles to perform the same analysis in 1080 h, and becomes comparable to the Square Kilometre Array (SKA) with 217 dipoles. We find the SKA requires only 324 h of observation to conclusively distinguish between our models. Once model selection is achievable, an analysis of observational priors is performed finding that neutral fraction checks at specific redshifts add little to no inference. We show the difficulties in model selection at the level of distinguishing fiducial parameters within a model or distinguishing galaxies with a constant versus power-law mass-to-light ratio. Finally, we explore the use of the Savage–Dickey density ratio to show the redundancy of the parameterRmfpwithin21cmFAST.
登录
查看更多内容
影响因子:
2.2
作者:
E. Higson;Will Handley;M. Hobson;A. Lasenby
通讯作者:
E. Higson;Will Handley;M. Hobson;A. Lasenby
影响因子:
4.8
作者:
B. Greig;A. Mesinger
通讯作者:
B. Greig;A. Mesinger
DOI:
10.1111/j.1365-2966.2012.21318.x
发表时间:
2011
期刊:
arXiv: Cosmology and Nongalactic Astrophysics
影响因子:
--
作者:
A. Fialkov;R. Barkana;Dmitriy Tseliakhovich;C. Hirata
通讯作者:
C. Hirata
影响因子:
6.4
作者:
S. Nesseris;J. García-Bellido
通讯作者:
S. Nesseris;J. García-Bellido
影响因子:
6.8
作者:
AKAIKE, H
通讯作者:
AKAIKE, H