Physics
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsp41b..03u&link_type=abstract
American Geophysical Union, Spring Meeting 2005, abstract #SP41B-03
Physics
7524 Magnetic Fields, 7529 Photosphere
Scientific paper
Narrow-band filter imaging in the G band at 430 nm has been used to track the evolution of small-scale magnetic field elements for more than two decades. Because of the presence of many lines of the CH molecule, and the relatively high contrast at this short wavelength the G-band region is exceptionally suitable for this task. However, despite the frequent use of G-band brightness as magnetic field proxy it has not yet been well established what the precise mechanism is that makes the small scale magnetic elements appear bright. In particular, it is unclear why there is no one-to-one correlation between G-band brightness and magnetic field, as established from co-spatial magnetograms in atomic lines. To obtain a better understanding of the elusive G-band brightening mechanism we obtained high spatial- and spectral resolution spectra of the G-band region in Stokes I and V at the Dunn Solar Telescope on Sacramento Peak. We use the molecular Zeeman effect to determine line-of-sight magnetic field strength directly in the CH lines that provide most of the opacity in the G band, avoiding difficulties with co-aligning images and magnetograms taken seperately. We compare our observations with radiative transfer modeling of the Stokes profiles in snapshots of a magneto-hydrodynamic simulation of solar convection.
Balasubramaniam K.
Tritschler Alexandra
Uitenbroek Han
No associations
LandOfFree
Spectro-polarimetry of the G band does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Spectro-polarimetry of the G band, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectro-polarimetry of the G band will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1698849