The Effects of Polarization Crosstalk and Solar Rotation on Measuring Full-Disk Solar Photospheric Vector Magnetic Fields

Details The Effects of Polarization Crosstalk and Solar Rotation on Measuring Full-Disk Solar Photospheric Vector Magnetic Fields The Effects of Polarization Crosstalk and Solar Rotation on Measuring Full-Disk Solar Photospheric Vector Magnetic Fields

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007apj...666..559s&link_type=abstract

The Astrophysical Journal, Volume 666, Issue 1, pp. 559-575.

Astronomy and Astrophysics

Astronomy

9

Sun: Magnetic Fields, Sun: Rotation

Scientific paper

Observations of full-disk solar photospheric vector magnetic fields are very important for the studies of the global properties and evolution of solar magnetism. Such observations can allow us to investigate the magnetic connectivities between active regions and the nonpotentiality of magnetic fields with a much wider field of view (FOV) than do local-region observations. Therefore, we developed a full-disk vector magnetograph for the Solar Magnetism and Activity Telescope (SMAT) at Huairou Solar Observing Station. In this paper, we point out two problems that affect measurement accuracy of full-disk vector magnetic fields: circular-to-linear polarization crosstalk produced by the instrument, and wavelength shift due to solar rotation. An attempt is made to correct such polarization crosstalk and to reconstruct full-disk vector magnetic fields from polarization data. We also give a superficial discussion about the problem of an incompletely wide field of view (IWFOV) of the Lyot filter in the measurements of full-disk solar vector magnetic fields. In addition, the polarization data of the SMAT are compared with those of the Solar Magnetic Field Telescope (SMFT), which operates the local-region observations. Although the SMFT is 2-3 times as sensitive as the SMAT, there is a basic agreement on the polarization data of the two instruments.

Affiliated with

Also associated with

No associations

Rating

The Effects of Polarization Crosstalk and Solar Rotation on Measuring Full-Disk Solar Photospheric Vector Magnetic Fields 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 The Effects of Polarization Crosstalk and Solar Rotation on Measuring Full-Disk Solar Photospheric Vector Magnetic Fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Effects of Polarization Crosstalk and Solar Rotation on Measuring Full-Disk Solar Photospheric Vector Magnetic Fields will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1011083