|Author||Jin, C. L. ♦ Wang, J. X.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|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.|
|Learning Resource Type||Article|
|Publisher Place||United States|
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