K-band spectrum of water in sunspots

O L Polyansky, N F Zobov, S Viti, J Tennyson, P F Bernath, L Wallace

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The infrared spectrum of a sunspot, published in the form of an atlas by Wallace & Livingston, is analysed in the 2.17-1.96 mu m (4600-5100 cm(-1)) region where most of the transitions are due to hot water. Assignments are made using variational nuclear motion calculations based on a high-level ab initio electronic surface for water, with allowance for both adiabatic and nonadiabatic corrections to the Born-Oppenheimer approximation. 485 new lines are assigned to transitions in 10 vibrational bands, Only two of these vibrational bands have been previously identified. Newly assigned bands include the (061)-(050) and (071)-(060) vibrational transitions, for which even the lower vibrational levels had not been previously characterized. Assignments are made to levels as high as similar to 17,000 K above the origin.

Original languageEnglish
Pages (from-to)L205-L208
Number of pages4
JournalThe Astrophysical Journal
Issue number2
Publication statusPublished - 10 Nov 1997


  • infrared, solar system
  • infrared, stars
  • molecular data
  • sunspots
  • H2O
  • SUN

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