Effects of a decaying cosmological term on the formation of molecules and first objects

M. Hashimoto, T. Kamikawa, K. Arai

研究成果: Contribution to journalArticle査読

8 被引用数 (Scopus)

抄録

We investigate formation of molecules and first objects in a model with a decaying cosmological term (DCT). In particular, we show how the formation of important molecules such as H2 and HD is influenced during the epoch of the redshift z from 104 to 1. We find that for a phenomenological DCT molecular formation is significantly shifted to the earlier epoch by Δz ∼ 103 compared to the case in the standard big bang cosmology, as a result of the rapid decrease in the matter temperature. The mass of first objects is estimated using the timescales relevant to their formation. We suggest that the formation scenarios of the objects studied so far could be revised if a DCT is taken into account.

本文言語英語
ページ(範囲)13-19
ページ数7
ジャーナルAstrophysical Journal
598
1 I
DOI
出版ステータス出版済み - 11 20 2003

All Science Journal Classification (ASJC) codes

  • 天文学と天体物理学
  • 宇宙惑星科学

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