Hemispheric helicity trend for solar cycle 23

被引：113

作者：

Pevtsov, AA

Canfield, RC

Latushko, SM

机构：

[1] Natl Solar Observ Sacramento Peak, Sunspot, NM 88349 USA

[2] Montana State Univ, Dept Phys, Bozeman, MT 59717 USA

[3] Russian Acad Sci, Inst Solar Terr Phys, Irkutsk 664033, Russia

来源：

ASTROPHYSICAL JOURNAL | 2001年 / 549卷 / 02期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

Sun : activity; Sun : corona; Sun : magnetic fields;

D O I：

10.1086/319179

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Applying the same methods we used in solar cycle 22, we study active region vector magnetograms, full-disk X-ray images, and full-disk line-of-sight magnetograms to derive the helicity of solar magnetic fields in the first 4 years of solar cycle 23. We find that these three data sets all exhibit the same two key tendencies-significant scatter and weak hemispheric asymmetry-as were observed in solar cycle 22. This supports the interpretation of these tendencies as signatures of the writhing of magnetic flux by turbulence in the convection zone.

引用

页码：L261 / L263

页数：3

共 25 条

[21] Evidence for helically kinked magnetic flux ropes in solar eruptions [J].

Rust, DM ;

Kumar, A .

ASTROPHYSICAL JOURNAL, 1996, 464 (02) :L199-&

[22] The solar oscillations investigation - Michelson Doppler Imager [J].

Scherrer, PH ;

Bogart, RS ;

Bush, RI ;

Hoeksema, JT ;

Kosovichev, AG ;

Schou, J ;

Rosenberg, W ;

Springer, L ;

Tarbell, TD ;

Title, A ;

Wolfson, CJ ;

Zayer, I ;

Akin, D ;

Carvalho, B ;

Chevalier, R ;

Duncan, D ;

Edwards, C ;

Katz, N ;

Levay, M ;

Lindgren, R ;

Mathur, D ;

Morrison, S ;

Pope, T ;

Rehse, R ;

Torgerson, D .

SOLAR PHYSICS, 1995, 162 (1-2) :129-188

[23] THE SOFT-X-RAY TELESCOPE FOR THE SOLAR-A MISSION [J].

TSUNETA, S ;

ACTON, L ;

BRUNER, M ;

LEMEN, J ;

BROWN, W ;

CARAVALHO, R ;

CATURA, R ;

FREELAND, S ;

JURCEVICH, B ;

MORRISON, M ;

OGAWARA, Y ;

HIRAYAMA, T ;

OWENS, J .

SOLAR PHYSICS, 1991, 136 (01) :37-67

[24]

van Ballegooijen AA, 1999, GEOPH MONOG SERIES, V111, P213

[25] Analysis of the transverse magnetic field in solar active regions by the Huairou vector magnetograph [J].

Zhang, HQ .

SOLAR PHYSICS, 2000, 197 (02) :235-251

← 1 2 3 →