Statistics of baryon isocurvature perturbations in the inflationary universe

Kazuhiro Yamamoto, Michiyasu Nagasawa, Misao Sasaki, Hiroshi Suzuki, Jun Ichi Yokoyama

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


The statistical distribution of baryon-number fluctuations, which may provide a proper initial condition for the minimal isocurvature scenario, is carefully investigated both analytically and numerically. For fluctuations associated with power-law inflation, we find that the distribution is highly non-Gaussian on scales of pregalactic star formation while it is Gaussian on scales of large-scale structure. On the other hand, in the pure de Sitter universe, it is shown to be Gaussian on any astrophysical scale. It is also discussed why the Gaussian nature appears in these models.

Original languageEnglish
Pages (from-to)4206-4217
Number of pages12
JournalPhysical Review D
Issue number10
Publication statusPublished - 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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