論文

基本情報

氏名 山内 大介
氏名(カナ) ヤマウチ ダイスケ
氏名(英語) Yamauchi Daisuke
所属 理学部 物理学科
職名 講師
researchmap研究者コード B000327615
researchmap機関 岡山理科大学

題名

Analytic model for CMB temperature angular power spectrum from cosmic (super-)strings

単著・共著の別

共著

著者

Daisuke Yamauchi, Keitaro Takahashi, Yuuiti Sendouda, Chul-Moon Yoo, Misao Sasaki

概要

We present a new analytical method to calculate the small angle cosmic microwave background (CMB) temperature angular power spectrum due to cosmic (super-)string segments. In particular, using our method, we clarify the dependence on the intercommuting probability ?. We find that the power spectrum is dominated by Poisson-distributed string segments. The power spectrum for a general value of ? has a plateau on large angular scales and shows a power-law decrease on small angular scales. The resulting spectrum in the case of conventional cosmic strings is in very good agreement with the numerical result obtained by Fraisse et al.. Then we estimate the upper bound on the dimensionless tension of the string for various values of ? by assuming that the fraction of the CMB power spectrum due to cosmic (super-)strings is less than ten percent at various angular scales up to ℓ =2000. We find that the amplitude of the spectrum increases as the intercommuting probability. As a consequence, strings with smaller intercommuting probabilities are found to be more tightly constrained.

発表雑誌等の名称

Physical Review D

出版者

82

063518

開始ページ

終了ページ

発行又は発表の年月

2010/09

査読の有無

有り

招待の有無

無し

記述言語

英語

掲載種別

研究論文(学術雑誌)

ISSN

ID:DOI

https://doi.org/10.1103/PhysRevD.82.063518

ID:NAID(CiNiiのID)

ID:PMID

URL

JGlobalID

arXiv ID

1006.0687

ORCIDのPut Code

DBLP ID