Constraining the molecular gas in the environs of a z ~ 8 gamma-ray burst host galaxy

@article{Stanway2010ConstrainingTM,
  title={Constraining the molecular gas in the environs of a z ~ 8 gamma-ray burst host galaxy},
  author={Elizabeth R Stanway and Malcolm N. Bremer and Nial R. Tanvir and Andrew J. Levan and Luke J. M. Davies},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2010},
  volume={410},
  pages={1496-1502}
}
GRB 090423 is the most distant spectroscopically confirmed source observed in the Universe. Using observations at 37.5 GHz, we place constraints on molecular gas emission in the CO (3-2) line from its host galaxy and immediate environs. The source was not detected either in line emission or in the rest-frame 850-μm continuum, yielding an upper limit of S 8mm = 9.3 μJy and M(H 2 ) < 4.3 × 10 9 M ⊙ (3σ), applying standard conversions. This implies that the host galaxy of GRB 090423 did not… 

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