BROADENGING OF FE-X (6374A-ANGSTROM) PROFILES ABOVE THE LIMB IN A CORONAL HOLE

被引：18

作者：

HASSLER, DM

机构：

[1] HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA

[2] NASA, GODDARD SPACE FLIGHT CTR, GREENBELT, MD 20771 USA

来源：

SPACE SCIENCE REVIEWS | 1994年 / 70卷 / 1-2期

关键词：

SOLAR CORONA; CORONAL HOLES; SOLAR WIND; UV SPECTROSCOPY;

D O I：

10.1007/BF00777895

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Profiles of the visible Fe X (6374 angstrom) coronal emission line as a function of height above the limb were obtained out to 1.16 solar radii in a coronal hole using the NSO/Sacramento Peak Observatory Coronagraph, Universal Spectrograph and a CCD camera. These are the first coronal line profiles obtained as a function of height in a coronal hole from the ground. Analysis of the line widths suggests a large component of nonthermal broadening which increases with height ranging from 40 to 60 km/s, depending upon the assumed temperature or thermal component of the profile.

引用

页码：373 / 377

页数：5

共 16 条

[1] CORONAL TEMPERATURE GRADIENT AND SOLAR WIND [J].