Science Advances

Supplementary Materials

This PDF file includes:

  • Fig. S1. The UV reactor.
  • Fig. S2. Reactor emission plot of the measured (solid line) emission from the Hg lamps over the 200- to 400-nm spectral range.
  • Fig. S3. Stellar spectra.
  • Fig. S4. Surface spectral irradiance at Cambridge.
  • Fig. S5. Arrhenius plots.
  • Fig. S6. Flare spectra.
  • Table S1. HCN + SO32.
  • Table S2. Glycolonitrile + HS.
  • Table S3. Percentages of stars in different spectral type ranges that meet the criterion for activity given by Eq. 38 (defined here as “Active” stars).
  • Section S1. General procedures for reactions of KCN with Na2SO3 in the dark.
  • Section S2. General procedures for reactions of KCN with Na2SO3 under UV light.
  • Section S3. General procedures for reactions of glycolonitrile with NaHS in the dark.
  • Section S4. General procedures for reactions of glycolonitrile with NaHS under UV light.
  • References (4648)

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