EMISSION MEASURE DISTRIBUTION AND HEATING OF TWO ACTIVE REGION CORES

被引：71

作者：

Tripathi, Durgesh ^{[1
,2
]}

Klimchuk, James A. ^{[3
]}

Mason, Helen E. ^{[2
]}

机构：

[1] Interuniv Ctr Astron & Astrophys, Pune 411007, Maharashtra, India

[2] Univ Cambridge, Dept Appl Math & Theoret Phys, Cambridge CB3 0WA, England

[3] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

来源：

ASTROPHYSICAL JOURNAL | 2011年 / 740卷 / 02期

关键词：

Sun: atmosphere; Sun: corona; Sun: transition region; Sun: UV radiation; ULTRAVIOLET IMAGING SPECTROMETER; CORONAL LOOPS; SOLAR CORONA; TRANSITION REGION; DENSITY STRUCTURE; ATOMIC DATABASE; RAY TELESCOPE; HOT PLASMA; HINODE; TRACE;

D O I：

10.1088/0004-637X/740/2/111

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using data from the Extreme-ultraviolet Imaging Spectrometer aboard Hinode, we have studied the coronal plasma in the core of two active regions. Concentrating on the area between opposite polarity moss, we found emission measure distributions having an approximate power-law form EM proportional to T-2.4 from log T = 5.5 up to a peak at log T = 6.55. We show that the observations compare very favorably with a simple model of nanoflare-heated loop strands. They also appear to be consistent with more sophisticated nanoflare models. However, in the absence of additional constraints, steady heating is also a viable explanation.

引用

页数：10

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