English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We report novel spectropolarimetric observations of sunspots carried out withthe Tenerife Infrared Polarimeter (TIP) in a near-IR spectral region around15410 A, which is known to contain two groups of prominent OH lines that showcircular polarization signals of opposite polarity. Surrounding thesewell-known OH lines, we have discovered the presence of CN lines of the $\Deltav=1$ band which show anomalous polarization profiles. Although the Stokes Vsignals of the OH lines are antisymmetric and with a sizable amplitude, the CNlines show almost negligible circular polarization. On the contrary, the linearpolarization signals turn out to be much stronger in the CN lines than in theOH lines. Interestingly, these CN lines present striking antisymmetric linearpolarization profiles, which we are able to explain and model via thePaschen-Back effect theory for diatomic molecules. The presence of suchpeculiar CN lines in the same spectral region of the OH lines may be useful toimprove our empirical knowledge of solar magnetic fields via the simultaneousobservation and modeling of the transverse and longitudinal Zeeman effects intwo different molecular species.Comment: 11 pages, 3 figures, published in ApJ 623, L57 (2005

Observation and Modeling of Anomalous CN Polarization Profiles Produced by the Molecular Paschen-Back Effect in Sunspots