Zeeman-split opposite-polarity OH lines in sunspot spectra: Resolution of a puzzle

Details Zeeman-split opposite-polarity OH lines in sunspot spectra: Resolution of a puzzle Zeeman-split opposite-polarity OH lines in sunspot spectra: Resolution of a puzzle

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...380l...5b&link_type=abstract

Astronomy and Astrophysics, v.380, p.L5-L8 (2001)

Astronomy and Astrophysics

Astrophysics

11

Sun: Sunspots, Molecules, Polarization

Scientific paper

We present the first synthetic Zeeman-split Stokes I and V profiles of OH lines. They explain the puzzling observations reported by Harvey (\cite{har85}) of two pairs of lines from the infrared (2, 0) band with Stokes V profiles exhibiting opposite polarities. Our new perturbation calculations of the Zeeman effect in diatomic molecules, which allow states of any multiplicity to be treated, resolve the puzzle. They reveal that the unusual behaviour of these lines stems from the fact that the two pairs have effective Landé factors of similar magnitude, but of opposite signs.

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