Complications in the ALMA Detection of Phosphine at Venus

@article{Akins2021ComplicationsIT,
  title={Complications in the ALMA Detection of Phosphine at Venus},
  author={Alex B. Akins and Andrew P. Lincowski and Victoria S. Meadows and Paul G. Steffes},
  journal={The Astrophysical Journal Letters},
  year={2021},
  volume={907}
}
Recently published Atacama Large Millimeter Array (ALMA) observations suggest the presence of 20 ppb PH3 in the upper clouds of Venus. This is an unexpected result, as PH3 does not have a readily apparent source and should be rapidly photochemically destroyed according to our current understanding of Venus atmospheric chemistry. While the reported PH3 spectral line at 266.94 GHz is nearly colocated with an SO2 spectral line, the nondetection of stronger SO2 lines in the wideband ALMA data is… 
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