The most oxygen-poor planetary nebula

被引：0
|
作者：
Richer, MG
Tovmassian, G
Stasinska, G
Gutierrez, C
Veillet, C
机构：
[1] UNAM, Astron Inst, Observ Astron Nacl, San Diego, CA 92143 USA
[2] Observ Meudon, F-92195 Meudon, France
[3] Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Spain
[4] Canada France Hawaii Telescope Corp, Kamuela, HI 96743 USA
来源：
PLANETARY NEBULAE: THEIR EVOLUTION AND ROLE IN THE UNIVERSE | 2003年 / 209期
关键词：
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
PNG135.9+55.9 is a halo planetary nebula recently discovered among the objects from the Second Byurakan Survey. Based upon our first observations, a photoionization model analysis shows that the oxygen abundance in the nebula must be extremely low, probably 10(-2)-10(-3) of the solar value. This finding has strong implications on our understanding of the formation of planetary nebulae, of mixing processes in the stellar progenitors and of the evolution of the Galactic halo.
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页码：595 / 596
页数：2
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