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Author Jin, C. L. ♦ Wang, J. X.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ♦ FLUX DENSITY ♦ MAGNETIC FIELDS ♦ PHOTOSPHERE ♦ POLARIMETRY ♦ POLARIZATION ♦ SENSITIVITY ♦ SIGNAL-TO-NOISE RATIO ♦ SOLAR CYCLE ♦ SPACE ♦ SPATIAL RESOLUTION ♦ SUN ♦ SUNSPOTS ♦ TELESCOPES ♦ VARIATIONS
Abstract The ubiquitousness of the solar inter-network horizontal magnetic field has been revealed by space-borne observations with high spatial resolution and polarization sensitivity. However, no consensus has been achieved on the origin of the horizontal field among solar physicists. For a better understanding, in this study, we analyze the cyclic variation of the inter-network horizontal field by using the spectro-polarimeter observations provided by the Solar Optical Telescope on board Hinode, covering the interval from 2008 April to 2015 February. The method of wavelength integration is adopted to achieve a high signal-to-noise ratio. It is found that from 2008 to 2015 the inter-network horizontal field does not vary when solar activity increases, and the average flux density of the inter-network horizontal field is 87 ± 1 G, In addition, the imbalance between horizontal and vertical fields also keeps invariant within the scope of deviation, i.e., 8.7 ± 0.5, from the solar minimum to maximum of solar cycle 24. This result confirms that the inter-network horizontal field is independent of the sunspot cycle. The revelation favors the idea that a local dynamo is creating and maintaining the solar inter-network horizontal field.
ISSN 0004637X
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-07-01
Publisher Place United States
Journal Astrophysical Journal
Volume Number 807
Issue Number 1


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