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

Effect of cosmic strings with delayed scaling on CMB anisotropy

単著・共著の別

共著

著者

Kohei Kamada, Yuuhei Miyamoto, Daisuke Yamauchi, Jun'ichi Yokoyama

概要

The network of cosmic strings generated in a phase transition during inflation enters the scaling regime later than that of usual strings. If it occurs after the recombination, temperature anisotropies of the cosmic microwave background (CMB) at high multipole moments are significantly reduced. In this paper, we study such effects qualitatively and show that the constraint on the cosmic string tension from the CMB temperature anisotropies and B-mode polarizations can be relaxed. It is shown to be difficult to explain the recent BICEP2 and POLARBEAR results in terms of signals induced by cosmic strings alone even if we take into account the delayed scaling. However, the inflationary tensor-to-scalar ratio required to explain the observed B-mode signals can be slightly reduced to be consistent with the Planck constraint.

発表雑誌等の名称

Physical Review D

出版者

90

083502

開始ページ

終了ページ

発行又は発表の年月

2014/10

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.90.083502

ID:NAID(CiNiiのID)

ID:PMID

URL

JGlobalID

arXiv ID

1407.2951

ORCIDのPut Code

DBLP ID