Successful spectral synthesis of Zeeman-split molecular bands in sunspot spectra

Details Successful spectral synthesis of Zeeman-split molecular bands in sunspot spectra Successful spectral synthesis of Zeeman-split molecular bands in sunspot spectra

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...364l.101b&link_type=abstract

Astronomy and Astrophysics, v.364, p.L101-L104 (2000)

Statistics

22

Galaxies: Clusters: General, Galaxies: General, Galaxies: Statistics, Catalogs

Scientific paper

We present the first spectral synthesis of Zeeman-split Stokes profiles of the MgH A2Pi -X2BLAigma green system and TiO gamma -system. The calculations involve different regimes of the molecular Zeeman effect, up to the complete Paschen-Back effect for individual lines. The synthetic spectra are compared with observations of Stokes I and V in sunspot umbrae. We find that although the Stokes I spectra are reasonably reproduced, some lines are obviously still missing from the employed line lists. The Stokes V spectra turn out to be much cleaner since the missing lines do not appear to be Zeeman-split. We thus provide the first good fit to Zeeman-split molecular lines, including profiles with unconventional Stokes V shapes, determined by the Paschen-Back effect. Based on observations from the Canada-France-Hawaii Telescope operated by the National Research Council of Canada, the Centre National de la Recherche Scientifique de France and the University of Hawaii

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