Spectropolarimetry of Atomic and Molecular Lines near 4135 nm

Matthew James Penn, Han Uitenbroek, Alan Clark, Roy Coulter, Phil Goode, Wenda Cao

Research output: Contribution to journalArticlepeer-review


New spatially scanned spectropolarimetry sunspot observations are made of photospheric atomic and molecular absorption lines near 4135 nm. The relative splittings among several atomic lines are measured and shown to agree with values calculated with configuration interaction and intermediate coupling. Large splitting is seen in a line identified with Fe i at 4137 nm, showing multiple Stokes V components and an unusual linear polarization. This line will be a sensitive probe of quiet-Sun magnetic fields, with a magnetic sensitivity of 2.5 times higher than that of the well-known 1565 nm Fe i line.

Original languageEnglish (US)
Pages (from-to)2243-2252
Number of pages10
JournalSolar Physics
Issue number8
StatePublished - Oct 1 2016

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • Detectors
  • Solar atmosphere
  • Solar magnetic fields


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