AN ELEMENTAL ABUNDANCE ANALYSIS OF THE SUPERFICIALLY NORMAL A STAR VEGA

被引：53

作者：

ADELMAN, SJ ^{[1
]}

GULLIVER, AF ^{[1
]}

机构：

[1] BRANDON UNIV,DEPT PHYS & ASTRON,BRANDON R7A 6A9,MANITOBA,CANADA

来源：

ASTROPHYSICAL JOURNAL | 1990年 / 348卷 / 02期

关键词：

Stars: abundances; Stars: early-type; Stars: individual (α Lyr);

D O I：

10.1086/168279

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

An elemental abundance analysis of Vega has been performed using high-signal-to-noise 2.4 Å mm-1 Reticon observations of the region λλ4313-4809. Vega is found to be a metal-poor star with a mean under-abundance of 0.60 dex. The He/H ratio of 0.03 as derived from He I λ4472 suggests that the superficial helium convection zone has disappeared and that radiative diffusion is producing the photospheric abundance anomalies.

引用

页码：712 / 717

页数：6

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