Skewness in CMB temperature fluctuations from bended cosmic (super-)strings

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

Research output: Contribution to conferencePaperpeer-review

Abstract

We have computed the one-point pdf of small-Angle CMB temperature fluctuations due to cosmic (super-)strings with a simple model of the bended long segments numerically and have showed that it reproduced the feature of the numerical simulation in Fraisse et al. [3], especially skewness in one-point probability distribution function. We found that skewness would appear if we take curvature of segment and its correlation with its velocity into account. If a segment has a curvature, the symmetry of temperature fluctuations between positive and negative value is broken and the amplitude of the asymmetry depends on the angle between the curvature vector and the velocity vector of the segment.

Original languageEnglish
Pages393-396
Number of pages4
Publication statusPublished - 2009
Event19th Workshop on General Relativity and Gravitation in Japan, JGRG 2009 - Tokyo, Japan
Duration: 2009 Nov 302009 Dec 4

Other

Other19th Workshop on General Relativity and Gravitation in Japan, JGRG 2009
Country/TerritoryJapan
CityTokyo
Period09/11/3009/12/4

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Fingerprint

Dive into the research topics of 'Skewness in CMB temperature fluctuations from bended cosmic (super-)strings'. Together they form a unique fingerprint.

Cite this