caa a22 4500 445345977 CHVBK 20180317142829.0 cr unu---uuuuu 170323e20110501xx s 000 0 eng 10.1007/s11207-011-9741-6 doi (NATIONALLICENCE)springer-10.1007/s11207-011-9741-6 Comparison of Nonlinear Force-Free Field and Potential Field in the Quiet Sun [Elektronische Daten] [S. Liu, H. Zhang, J. Su] In this paper, a potential field extrapolation and three nonlinear force-free (NLFF) field extrapolations (optimization, direct boundary integral (DBIE), and approximate vertical integration (AVI) methods) are used to study the spatial configuration of magnetic field in the quiet Sun. It is found that differences in the computed field strengths among the three NLFF and potential fields exist in the low layers. However, they tend to disappear as the height increases, and the differences are of the order of 0.1 gauss when the height exceeds ≈ 2000km above the photosphere. The difference in azimuth angles between each NLFF field model and the potential field is as follows: for the optimization field, it decreases evidently as the height increases; for the DBIE field, it almost stays constant and shows no significant change as the height increases; for the AVI field, it increases slowly as the height increases. Our analysis shows that the reconstructed NLFF fields deviate significantly from the potential field in the quiet Sun. Springer Science+Business Media B.V., 2011 Chromosphere nationallicence Magnetic field nationallicence Quiet Sun nationallicence Liu S. Key Laboratory of Solar Activity, National Astronomical Observatory, Chinese Academy of Sciences, Beijing, China aut Zhang H. Key Laboratory of Solar Activity, National Astronomical Observatory, Chinese Academy of Sciences, Beijing, China aut Su J. Key Laboratory of Solar Activity, National Astronomical Observatory, Chinese Academy of Sciences, Beijing, China aut Solar Physics Springer Netherlands 270/1(2011-05-01), 89-107 0038-0938 270:1<89 2011 270 11207 https://doi.org/10.1007/s11207-011-9741-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11207-011-9741-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liu S. Key Laboratory of Solar Activity, National Astronomical Observatory, Chinese Academy of Sciences, Beijing, China aut NATIONALLICENCE 700 1- Zhang H. Key Laboratory of Solar Activity, National Astronomical Observatory, Chinese Academy of Sciences, Beijing, China aut NATIONALLICENCE 700 1- Su J. Key Laboratory of Solar Activity, National Astronomical Observatory, Chinese Academy of Sciences, Beijing, China aut NATIONALLICENCE 773 0- Solar Physics Springer Netherlands 270/1(2011-05-01), 89-107 0038-0938 270:1<89 2011 270 11207 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer