Dust evolution in galaxies at z > 7

Tsutomu T. Takeuchi, Ryosuke S. Asano, Sayaka Nagasaki, Takaya Nozawa, Yoichi Tamura, Ken Mawatari, Akio K. Inoue

研究成果: Article査読

抄録

Recently huge amount of dust Mdust ≃ 106-7M in galaxies at z = 7-8 has been discovered by ALMA observations. The suggested timescale of the dust production was a few-several×108 yr, while the stellar mass was several × 109M . This amount of dust cannot be easily explained only by a supply from supernovae if we consider the dust destruction by reverse shocks. We propose that these values can be consistently explained if we take into account the grain growth in the interstellar medium (ISM). This scenario successfully reproduces the evolution of the dust mass, as well as the SFR, and stellar mass simultaneously. We conclude that even at such an early epoch of the Universe, the dust grain growth in the ISM plays a significant role in galaxies.

本文言語English
ページ(範囲)312-313
ページ数2
ジャーナルProceedings of the International Astronomical Union
15
S341
DOI
出版ステータスPublished - 2019
外部発表はい

ASJC Scopus subject areas

  • 天文学と天体物理学
  • 宇宙惑星科学

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