THE O++/H+ ABUNDANCE RATIO IN GASEOUS NEBULAE DERIVED FROM RECOMBINATION LINES

被引：122

作者：

PEIMBERT, M ^{[1
]}

STOREY, PJ ^{[1
]}

TORRESPEIMBERT, S ^{[1
]}

机构：

[1] UNIV LONDON UNIV COLL, DEPT PHYS & ASTRON, LONDON WC1E 6BT, ENGLAND

来源：

ASTROPHYSICAL JOURNAL | 1993年 / 414卷 / 02期

关键词：

H-II REGIONS; ISM; ABUNDANCES;

D O I：

10.1086/173108

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present O+2/H+ values for the Orion Nebula, M17, and NGC 6572 based on O II recombination lines, which are independent of the temperature structure of the observed nebulae. In the H II regions sampled (Orion and M17) the O+2/H+ values derived from O II recombination lines are about a factor of 2 higher than those derived from O III forbidden lines. These differences can be accounted for by the presence of spatial temperature variations over the observed volumes. The abundances derived from the recombination lines eliminate the O/H discrepancy between the stellar values and the H II region values of the solar neighborhood.

引用

页码：626 / 631

页数：6

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