Research on Full-Sky Simulations of Cosmic Microwave Background in a Flat Universe with Finite Topology
Date Issued
2004
Date
2004
Author(s)
Huang, Chih-Wei
DOI
en-US
Abstract
We tested a statistic trying to find out whether there exists a preferred direction in the Cosmic Microwave Background (CMB) in a flat universe with finite topology. Recent observations of the Cosmic Microwave Background indicate that our universe is nearly flat, if not exactly flat, and is strongly consistent with several cosmological models that have finite topologies. In this thesis, first we use a simulation code by Jiun-Huei Proty Wu (National Taiwan University, Taiwan, ROC) to generate full-sky CMB maps in a flat universe with finite topology. Then we apply the preferred-direction statistic on our simulated CMB maps to seek for the level of `preferred directionality'. Unfortunately we can not conclude the final results until we add the Monte Carlo simulations of our model. But this method is still a general technique and it also has the advantage of being easily calculable for the mega-pixel maps which will soon be available.
Subjects
統計
宇宙學
拓撲
平坦
模擬
偏好方向
微波背景輻射
Cosmology
statistic
Cosmic Microwave Background
topology
simulation
CMB
flat
preferred direction
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-93-R91222042-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):4284e0fbda49dbd99ca6a317ed1903bd