Small-scale Features of Thermal Inflation: CMB Distortion, Substructure Abundance, and 21cm Power Spectrum

  • Hong, Sungwook E. (Korea Astronomy and Space Science Institute) ;
  • Zoe, Heeseung (Daegu Gyeongbuk Institute of Science and Technology) ;
  • Ahn, Kyungjin (Chosun University) ;
  • Cho, Kihyun (Korea Advanced Institute of Science and Technology) ;
  • Stewart, Ewan D. (Korea Advanced Institute of Science and Technology)
  • 발행 : 2017.10.10

초록

Thermal inflation is an additional inflationary mechanism before the big bang nucleosynthesis, which solves the moduli problem and naturally provides a plausible dark matter candidate. Thermal inflation leaves a slight enhancement followed by huge suppression of a factor of ~50 in the curvature and matter power spectrum, which can be expressed in terms of a single characteristic scale $k_b$. Here we describe the observability of the small-scale features of thermal inflation from various observations, such as CMB distortion, satellite galaxy abundance in the Milky-Way-sized galaxies, and 21-cm power spectrum before the epoch of reionization.

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