N-III LINE EMISSION IN PLANETARY-NEBULAE - NOT BOWEN FLUORESCENCE

被引：10

作者：

KASTNER, SO ^{[1
]}

BHATIA, AK ^{[1
]}

机构：

[1] NASA,GODDARD SPACE FLIGHT CTR,ASTRON & ASTROPHYS LAB,ASTRON BRANCH,GREENBELT,MD 20771

来源：

ASTROPHYSICAL JOURNAL | 1991年 / 381卷 / 02期

关键词：

ATOMIC PROCESSES; GALAXIES; SEYFERT; LINE FORMATION; NEBULAE; GENERAL; STARS; EMISSION-LINE; X-RAYS; BINARIES;

D O I：

10.1086/186196

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A direct comparison of photometrically observed line ratios in the N III 4640 and 4100 angstrom multiplets emitted by planetary nebulae with theoretically predicted ratios expected from the postulated Bowen process of selective photoexcitation by an O III resonance line shows that the N III lines are not produced by the Bowen process as has been commonly accepted. This will have consequences for the interpretation of these lines in other astrophysical sources. A further, unexpected result is that the N III level populations involved are found to be essentially in statistical equilibrium. Possible populating mechanisms are briefly discussed.

引用

页码：L59 / L62

页数：4

共 18 条

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