Dust grain growth at high redshift: starburst-driven CMB-dark supershells

  title={Dust grain growth at high redshift: starburst-driven CMB-dark supershells},
  author={Sergio Mart'inez-Gonz'alez and Sergiy Silich and Guillermo Tenorio-Tagle},
We present a novel scenario for the growth of dust grains in galaxies at high-redshift (z ∼ 6). In our model, the mechanical feedback from massive star clusters evolving within high-density pre-enriched media allows to pile-up a large amount of matter into massive supershells. If the gas metallicity (≥ Z ), number density (≥ 10 cm−3) and dust-to-gas mass ratio (∼ 1/150 × Z) within the supershell are sufficiently large, such supershells may become optically thick to the starlight emerging from… Expand
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