A SPECTROSCOPIC ANALYSIS OF 33 OF THE MOST METAL-POOR STARS .1.

被引：157

作者：

MCWILLIAM, A ^{[1
]}

PRESTON, GW ^{[1
]}

SNEDEN, C ^{[1
]}

SHECTMAN, S ^{[1
]}

机构：

[1] UNIV TEXAS,DEPT ASTRON,AUSTIN,TX 78712

来源：

ASTRONOMICAL JOURNAL | 1995年 / 109卷 / 06期

关键词：

D O I：

10.1086/117485

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present 7954 equivalent widths for lines derived from echelle spectra of 33 extremely metal-poor stars. One of them, CS 22892-052, has extraordinarily strong heavy element lines. Measurements for lines which appear in adjacent echelle orders confirm our computed equivalent width uncertainties. Comparison of our equivalent widths with published values shows that our equivalent widths (Wλ) fall in the range of measurements found from other studies. We present a table of regression relations which can be used to place our equivalent widths onto other systems. We also outline the techniques used in a semiautomated approach to Wλ measurement. © 1995 American Astronomical Society.

引用

页码：2736 / 2756

页数：21

共 20 条

[1]

[Anonymous], PHOTOMETRIC ATLAS SP

[2]

BARBUY B, 1985, ASTRON ASTROPHYS, V144, P343

[3] A SEARCH FOR STARS OF VERY LOW METAL ABUNDANCE .2. [J].