Statistics of baryon isocurvature perturbations in the inflationary universe

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

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

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
Volume46
Issue number10
DOIs
Publication statusPublished - Jan 1 1992

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baryons
universe
statistics
perturbation
statistical distributions
star formation
astrophysics

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

Statistics of baryon isocurvature perturbations in the inflationary universe. / Yamamoto, Kazuhiro; Nagasawa, Michiyasu; Sasaki, Misao; Suzuki, Hiroshi; Yokoyama, Jun Ichi.

In: Physical Review D, Vol. 46, No. 10, 01.01.1992, p. 4206-4217.

Research output: Contribution to journalArticle

Yamamoto, Kazuhiro ; Nagasawa, Michiyasu ; Sasaki, Misao ; Suzuki, Hiroshi ; Yokoyama, Jun Ichi. / Statistics of baryon isocurvature perturbations in the inflationary universe. In: Physical Review D. 1992 ; Vol. 46, No. 10. pp. 4206-4217.
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