MULTIFRACTAL MEASURE OF THE SOLAR MAGNETIC-FIELD

被引：86

作者：

LAWRENCE, JK

RUZMAIKIN, AA

CADAVID, AC

机构：

[1] San Fernando Observatory, Department of Physics and Astronomy, California State Univ., Northridge, Northridge, CA 91330

来源：

ASTROPHYSICAL JOURNAL | 1993年 / 417卷 / 02期

关键词：

SUN; MAGNETIC FIELDS;

D O I：

10.1086/173360

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze high-resolution, digital, photoelectric images of solar photospheric magnetic fields. The line-of-sight fields are found to scale in a self-similar way with resolution and thus can be expressed in the form of a signed multifractal measure. The scaling properties of the measure are used to extrapolate field integrals, such as moments of the magnetic field, below resolvable limits. The scaling of the field moments is characteristic of highly intermittent fields. We suggest that the quiet-Sun photospheric fields are generated by local dynamo action based on random convective motions at high magnetic Reynolds number. The properties of active region images are determined by the presence of fields generated by the global, mean field dynamo.

引用

页码：805 / 811

页数：7

共 36 条

[1] PERCOLATION THEORY AND THE GEOMETRY OF PHOTOSPHERIC MAGNETIC-FLUX CONCENTRATIONS [J].

BALKE, AC ;

SCHRIJVER, CJ ;

ZWAAN, C ;

TARBELL, TD .

SOLAR PHYSICS, 1993, 143 (02) :215-227

[2] FRACTAL LEVEL SETS AND MULTIFRACTAL FIELDS IN DIRECT SIMULATIONS OF TURBULENCE [J].

BRANDENBURG, A ;

PROCACCIA, I ;

SEGEL, D ;

VINCENT, A .

PHYSICAL REVIEW A, 1992, 46 (08) :4819-4828

[3]

Bunde A., 1991, FRACTALS DISORDERED

[4]

CHAPMAN GA, 1989, HIGH SPATIAL RESOLUT, P402

[5] DIRECT DETERMINATION OF THE F (ALPHA) SINGULARITY SPECTRUM AND ITS APPLICATION TO FULLY-DEVELOPED TURBULENCE [J].

CHHABRA, AB ;

MENEVEAU, C ;

JENSEN, RV ;

SREENIVASAN, KR .

PHYSICAL REVIEW A, 1989, 40 (09) :5284-5294

[6]

Evertsz C.J.G., 1992, CHAOS FRACTALS NEW F, P921

[7] CHAOTIC FLOWS AND MAGNETIC DYNAMOS [J].

FINN, JM ;

OTT, E .

PHYSICAL REVIEW LETTERS, 1988, 60 (09) :760-763

[8]

Frisch U., 1985, TURBULENCE PREDICTAB, P84

[9] NUMERICAL-CALCULATIONS OF FAST DYNAMOS IN SMOOTH VELOCITY-FIELDS WITH REALISTIC DIFFUSION [J].

GALLOWAY, DJ ;

PROCTOR, MRE .

NATURE, 1992, 356 (6371) :691-693

[10]

Greimel R., 1990, Vistas in Astronomy, V33, P413, DOI 10.1016/0083-6656(90)90016-2

← 1 2 3 4 →