Supermassive star formation with non-LTE primordial-gas chemistry

K. Sugimura, C. M. Coppola, K. Omukai, D. Galli, F. Palla

研究成果: Conference article査読

1 被引用数 (Scopus)

抄録

The remnant black holes (BHs) of supermassive stars formed at z > 10 are promising candidates of the seeds for supermassive BHs. They are thought to form in pristine atomic cooling halos in which H2 cooling is totally suppressed by strong external radiation. Here, we obtain the critical FUV specific intensity Jcr21 (in units of 10-21erg s-1 Hz-1 sr-1 cm-2) required for supermassive star formation, with non-local thermodynamic equilibrium (non-LTE) primordial-gas chemistry. We consider the non-LTE chemistry with the vibrationally resolved H+2 kinetics, as well as realistic radiation spectra of galaxies. We find that while the effect of non-LTE H+2 chemistry is important for soft radiation sources, it is negligible and Jcr21 ∼ 1000 for the hard spectra of young and metal-poor galaxies, considered as typical radiation sources in the early Universe.

本文言語English
ページ(範囲)860-861
ページ数2
ジャーナルMemorie della Societa Astronomica Italiana - Journal of the Italian Astronomical Society
88
4
出版ステータスPublished - 2017
イベント2017 Conference Francesco's Legacy: Star Formation in Space and Time - Firenze, Italy
継続期間: 2017 6月 52017 6月 9

ASJC Scopus subject areas

  • 電子工学および電気工学
  • 放射線学、核医学およびイメージング
  • 天文学と天体物理学
  • 器械工学
  • 原子分子物理学および光学

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