DETECTION OF VORTEX TUBES IN SOLAR GRANULATION FROM OBSERVATIONS WITH SUNRISE

被引：68

作者：

Steiner, O. ^{[1
]}

Franz, M. ^{[1
]}

Gonzalez, N. Bello ^{[1
]}

Nutto, Ch. ^{[1
]}

Rezaei, R. ^{[1
]}

Martinez Pillet, V. ^{[2
]}

Bonet Navarro, J. A. ^{[2
]}

del Toro Iniesta, J. C. ^{[3
]}

Domingo, V. ^{[4
]}

Solanki, S. K. ^{[5
,6
]}

Knoelker, M. ^{[7
]}

Schmidt, W. ^{[1
]}

Barthol, P. ^{[5
]}

Gandorfer, A. ^{[5
]}

机构：

[1] Kiepenheuer Inst Sonnenphys, D-79104 Freiburg, Germany

[2] Inst Astrofis Canarias, Tenerife 38200, Spain

[3] CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain

[4] Univ Valencia, Grp Astron & Ciencias Espacio, Valencia 46980, Spain

[5] Max Planck Inst Sonnensyst Forsch, D-37191 Katlenburg Lindau, Germany

[6] Kyung Hee Univ, Sch Space Res, Yongin 446701, Gyeonggi, South Korea

[7] Natl Ctr Atmospher Res, High Altitude Observ, Boulder, CO 80307 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2010年 / 723卷 / 02期

基金：

美国国家科学基金会;

关键词：

convection; hydrodynamics; Sun: granulation; Sun: photosphere; turbulence; STRATIFIED FLUIDS; MAGNETIC-FIELD; VORTICITY; SURFACE; FLOWS;

D O I：

10.1088/2041-8205/723/2/L180

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have investigated a time series of continuum intensity maps and corresponding Dopplergrams of granulation in a very quiet solar region at the disk center, recorded with the Imaging Magnetograph eXperiment (IMaX) on board the balloon-borne solar observatory Sunrise. We find that granules frequently show substructure in the form of lanes composed of a leading bright rim and a trailing dark edge, which move together from the boundary of a granule into the granule itself. We find strikingly similar events in synthesized intensity maps from an ab initio numerical simulation of solar surface convection. From cross sections through the computational domain of the simulation, we conclude that these granular lanes are the visible signature of (horizontally oriented) vortex tubes. The characteristic optical appearance of vortex tubes at the solar surface is explained. We propose that the observed vortex tubes may represent only the large-scale end of a hierarchy of vortex tubes existing near the solar surface.

引用

页码：L180 / L184

页数：5

共 21 条

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