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Title: ON THE COMBINATION OF IMAGING-POLARIMETRY WITH SPECTROPOLARIMETRY OF UPPER SOLAR ATMOSPHERES DURING SOLAR ECLIPSES

Abstract

We present results from imaging polarimetry (IP) of upper solar atmospheres during a total solar eclipse on 2012 November 13 and spectropolarimetry of an annular solar eclipse on 2010 January 15. This combination of techniques provides both the synoptic spatial distribution of polarization above the solar limb and spectral information on the physical mechanism producing the polarization. Using these techniques together we demonstrate that even in the transition region, the linear polarization increases with height and can exceed 20%. IP shows a relatively smooth background distribution in terms of the amplitude and direction modified by solar structures above the limb. A map of a new quantity that reflects direction departure from the background polarization supplies an effective technique to improve the contrast of this fine structure. Spectral polarimetry shows that the relative contribution to the integrated polarization over the observed passband from the spectral lines decreases with height while the contribution from the continuum increases as a general trend. We conclude that both imaging and spectral polarimetry obtained simultaneously over matched spatial and spectral domains will be fruitful for future eclipse observations.

Authors:
; ; ; ; ; ; ; ;  [1]; ;  [2]
  1. Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming, Yunnan 650011 (China)
  2. Center for Advanced Instrumentation, University of Durham (United Kingdom)
Publication Date:
OSTI Identifier:
22133923
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 774; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ECLIPSE; FINE STRUCTURE; HEIGHT; IMAGES; POLARIMETRY; POLARIZATION; SOLAR ATMOSPHERE; SPATIAL DISTRIBUTION

Citation Formats

Qu, Z. Q., Deng, L. H., Dun, G. T., Chang, L., Zhang, X. Y., Cheng, X. M., Qu, Z. N., Xue, Z. K., Ma, L., Allington-Smith, J., and Murray, G.. ON THE COMBINATION OF IMAGING-POLARIMETRY WITH SPECTROPOLARIMETRY OF UPPER SOLAR ATMOSPHERES DURING SOLAR ECLIPSES. United States: N. p., 2013. Web. doi:10.1088/0004-637X/774/1/71.
Qu, Z. Q., Deng, L. H., Dun, G. T., Chang, L., Zhang, X. Y., Cheng, X. M., Qu, Z. N., Xue, Z. K., Ma, L., Allington-Smith, J., & Murray, G.. ON THE COMBINATION OF IMAGING-POLARIMETRY WITH SPECTROPOLARIMETRY OF UPPER SOLAR ATMOSPHERES DURING SOLAR ECLIPSES. United States. doi:10.1088/0004-637X/774/1/71.
Qu, Z. Q., Deng, L. H., Dun, G. T., Chang, L., Zhang, X. Y., Cheng, X. M., Qu, Z. N., Xue, Z. K., Ma, L., Allington-Smith, J., and Murray, G.. Sun . "ON THE COMBINATION OF IMAGING-POLARIMETRY WITH SPECTROPOLARIMETRY OF UPPER SOLAR ATMOSPHERES DURING SOLAR ECLIPSES". United States. doi:10.1088/0004-637X/774/1/71.
@article{osti_22133923,
title = {ON THE COMBINATION OF IMAGING-POLARIMETRY WITH SPECTROPOLARIMETRY OF UPPER SOLAR ATMOSPHERES DURING SOLAR ECLIPSES},
author = {Qu, Z. Q. and Deng, L. H. and Dun, G. T. and Chang, L. and Zhang, X. Y. and Cheng, X. M. and Qu, Z. N. and Xue, Z. K. and Ma, L. and Allington-Smith, J. and Murray, G.},
abstractNote = {We present results from imaging polarimetry (IP) of upper solar atmospheres during a total solar eclipse on 2012 November 13 and spectropolarimetry of an annular solar eclipse on 2010 January 15. This combination of techniques provides both the synoptic spatial distribution of polarization above the solar limb and spectral information on the physical mechanism producing the polarization. Using these techniques together we demonstrate that even in the transition region, the linear polarization increases with height and can exceed 20%. IP shows a relatively smooth background distribution in terms of the amplitude and direction modified by solar structures above the limb. A map of a new quantity that reflects direction departure from the background polarization supplies an effective technique to improve the contrast of this fine structure. Spectral polarimetry shows that the relative contribution to the integrated polarization over the observed passband from the spectral lines decreases with height while the contribution from the continuum increases as a general trend. We conclude that both imaging and spectral polarimetry obtained simultaneously over matched spatial and spectral domains will be fruitful for future eclipse observations.},
doi = {10.1088/0004-637X/774/1/71},
journal = {Astrophysical Journal},
number = 1,
volume = 774,
place = {United States},
year = {Sun Sep 01 00:00:00 EDT 2013},
month = {Sun Sep 01 00:00:00 EDT 2013}
}