First Polarimetric Measurements and Modeling of the Paschen-Back Effect in CaH Transitions
Additional information
Authors
Type
Journal Article
Year
2006
Language
English
Abstract
We report the first spectropolarimetric observations and modeling of CaH transitions in sunspots. We have detected strong polarization signals in many CaH lines from the A-X system, and we provide the first successful fit to the observed Stokes profiles using the previously developed theory of the Paschen-Back effect in arbitrary electronic states of diatomic molecules and polarized radiative transfer in molecular lines in stellar atmospheres. We analyze the CaH Stokes profiles together with quasi-simultaneous observations in TiO bands and conclude that CaH provides a valuable diagnostic of magnetic fields in sunspots, starspots, cool stars, and brown dwarfs
Journal
Astrophysical Journal, Letters
Volume
649
Start page number
L49
End page number
L52
DOI
Keywords
irsol-refereed-scientific-papers
