Isocurvature perturbations in extra radiation

Toyokakzu Sekiguchi, Etsuko Kawakami, Masahiro Kawasaki, Koich Miyamoto, Kazunori Nakayama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Recent cosmological observations, including measurements of the CMB anisotropy and the primordial helium abundance, indicate the existence of an extra radiation component in the Universe beyond the standard three neutrino species. In this talk, we explore the possibility that the extra radiation has isocurvature fluctuation and its observational signatures.

Original languageEnglish
Title of host publicationProceedings of the 10th International conference on Gravitation, Astrophysics and Cosmology, ICGAC 2011
EditorsRoland Triay, Jean Tran Thanh Van, Ludwik M. Celnikier
PublisherThe Gioi Publishers
Pages202-204
Number of pages3
ISBN (Electronic)6047706193, 9786047706198
Publication statusPublished - 2011
Externally publishedYes
Event10th International conference on Gravitation, Astrophysics and Cosmology, ICGAC 2011 - Quy Nhon, Viet Nam
Duration: 2011 Dec 152011 Dec 21

Publication series

NameProceedings of the 10th International conference on Gravitation, Astrophysics and Cosmology, ICGAC 2011

Conference

Conference10th International conference on Gravitation, Astrophysics and Cosmology, ICGAC 2011
Country/TerritoryViet Nam
CityQuy Nhon
Period11/12/1511/12/21

ASJC Scopus subject areas

  • Astronomy and Astrophysics

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