Evolution of small-scale cosmological baryon perturbations and matter transfer functions

Kazuhiro Yamamoto, Naoshi Sugiyama, Humitaka Sato

研究成果: Contribution to journalArticle査読

23 被引用数 (Scopus)

抄録

The evolution of small-scale cosmological perturbations is carefully reexamined. Through interactions with photons via electrons, baryon perturbations show interesting behavior on some physical scales. Characteristic features of the evolution of baryon density fluctuations are discussed. In CDM models, a power-law growing phase of the small-scale baryon density fluctuations is found, characterized by a terminal velocity after the diffusion (Silk) damping and before the decoupling epoch. A transfer function for total matter-density fluctuations is then studied by taking those physical processes into account. We present an analytic transfer function as a function of redshift z that is applicable for the entire range up to a solar-mass scale in the high-z universe, and that is also suitable for high baryon fraction models.

本文言語英語
ページ(範囲)442-460
ページ数19
ジャーナルAstrophysical Journal
501
2 PART 1
DOI
出版ステータス出版済み - 7 10 1998
外部発表はい

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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