First Polarimetric Measurements and Modeling of the Paschen-Back Effect in CaH Transitions
Informazioni aggiuntive
Autori
Tipo
Articolo pubblicato in rivista scientifica
Anno
2006
Lingua
Inglese
Sommario
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
Parole chiave
irsol-refereed-scientific-papers
Periodico
Astrophysical Journal, Letters
Volume
649
Pagine (o numero dell’articolo)
L49-L52
DOI
