AL-II EMISSION-LINE STRENGTHS IN LOW-DENSITY ASTROPHYSICAL PLASMAS

被引：9

作者：

KEENAN, FP

HARRA, LK

AGGARWAL, KM

FEIBELMAN, WA

机构：

[1] QUEENS UNIV BELFAST,DEPT APPL MATH & THEORET PHYS,BELFAST BT7 1NN,ANTRIM,NORTH IRELAND

[2] NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771

[3] UNIV DELHI,DEPT PHYS & ASTROPHYS,DELHI 110007,INDIA

来源：

ASTROPHYSICAL JOURNAL | 1992年 / 385卷 / 01期

关键词：

ATOMIC PROCESSES; PLANETARY NEBULAE; INDIVIDUAL; (NGC; 7027); STARS; (RR-TELESCOPII);

D O I：

10.1086/170946

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Theoretical Al II emission line ratios, determined using electron impact excitation rates calculated with the R-matrix code, are presented for R = I(3s21S-3s3p3P2)/I(3s21S-3s3p3P1) = I(2660 angstrom)/I(2669 angstrom). This ratio is a useful electron density diagnostic for N(e) greater-than-or-equal-to 10(2) cm-3, its use being illustrated for the planetary nebula NGC 7027 and the symbiotic star RR Tel.

引用

页码：375 / 377

页数：3

共 14 条

[1] NEW VERSION OF GENERAL PROGRAM TO CALCULATE ATOMIC CONTINUUM PROCESSES USING R-MATRIX METHOD [J].