A comparison between theoretical and solar Fe XII UV line intensity ratios

被引：25

作者：

Binello, AM

Landi, E ^{[1
]}

Mason, HE

Storey, PJ

Brosius, JW

机构：

[1] USN, Res Lab, Washington, DC 20375 USA

[2] Univ Cambridge, Dept Appl Math & Theoret Phys, Cambridge CB2 1TN, England

[3] UCL, Dept Phys & Astron, London WC1E 6BT, England

[4] NASA, Goddard Space Flight Ctr, Astron & Solar Phys Lab, Raytheon ITSS, Greenbelt, MD 20771 USA

来源：

ASTRONOMY & ASTROPHYSICS | 2001年 / 370卷 / 03期

关键词：

Sun : general; atomic data; UV Sun : radiations; plasmas;

D O I：

10.1051/0004-6361:20010255

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A new set of radiative and electron collisional data for Fe XII was presented in two earlier papers. In the present work, rye derive level populations and theoretical line intensities for a range of plasma densities and temperatures. Observations of Fe XII lines obtained with the Solar EUV Rocket Telescope and Spectrograph are analysed both as a check the quality of the new atomic data and to determine the electron density in active regions and the quiet Sun. The discrepancy between the electron density values determined from Fe XII line intensity ratios and those obtained from other ions is investigated.

引用

页码：1071 / 1087

页数：17

共 53 条

[1] SOLAR SPECTRUM - WAVELENGTHS AND IDENTIFICATIONS FROM 160 TO 770 ANGSTROMS [J].