ELECTRIC CURRENTS AND CORONAL HEATING IN NOAA ACTIVE-REGION 6952

被引:34
作者
METCALF, TR
CANFIELD, RC
HUDSON, HS
MICKEY, DL
WULSER, JP
MARTENS, PCH
TSUNETA, S
机构
[1] LOCKHEED PALO ALTO RES LABS,DEPT 91-30,PALO ALTO,CA 94304
[2] UNIV TOKYO,TOKYO ASTRON OBSERV,INST ASTRON,MITAKA,TOKYO 181,JAPAN
关键词
SUN; ACTIVITY; CORONA; PHOTOSPHERE; X-RAYS; GAMMA-RAYS;
D O I
10.1086/174295
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We examine the spatial and temporal relationship between coronal structures observed with the soft X-ray telescope (SXT) on board the Yohkoh spacecraft and the vertical electric current density derived from photospheric vector magnetograms obtained using the Stokes Polarimeter at the Mees-Solar Observatory. We focus on a single active region: AR 6952 which we observed on 7 days during 1991 December. For 11 independent maps of the vertical electric current density co-aligned with non-flaring X-ray images, we search for a morphological relationship between sites of high vertical current density in the photosphere and enhanced X-ray emission in the overlying corona. We find no compelling spatial or temporal correlation between the sites of vertical current and the bright X-ray structures in this active region.
引用
收藏
页码:860 / 866
页数:7
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