Reference ultraviolet wavelengths of CrIII measured by Fourier transform spectrometry

被引：7
|
作者：
Smillie, D. G. [1 ]
Pickering, J. C. [1 ]
Smith, P. L. [2 ]
机构：
[1] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ, England
[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2008年 / 390卷 / 02期
关键词：
atomic data; line: identification; methods: laboratory;
D O I：
10.1111/j.1365-2966.2008.13768.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report Cr III ultraviolet (UV) transition wavelengths measured using a high-resolution Fourier transform spectrometer (FTS), for the first time, available for use as wavelength standards. The doubly ionized iron group element spectra dominate the observed opacity of hot B stars in the UV, and improved, accurate, wavelengths are required for the analysis of astronomical spectra. The spectrum was excited using a chromium-neon Penning discharge lamp and measured with the Imperial College vacuum ultraviolet FTS. 140 classified 3d(3)4s-3d(3)4p Cr III transition lines, in the spectral range 38 000 to 49 000 cm(-1) (2632 to 2041 angstrom), the strongest having wavelength uncertainties less than one part in 10(7), are presented.
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页码：733 / 740
页数：8
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