Open AccessReference ultraviolet wavelengths of Cr iii measured by Fourier transform spectrometry
Author(s) -
Smillie D. G.,
Pickering J. C.,
Smith P. L.
Publication year - 2008
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2008.13768.x
Subject(s) - physics , ultraviolet , wavelength , neon , opacity , spectral line , astrophysics , excited state , spectrometer , hollow cathode lamp , mass spectrometry , ionization , fourier transform spectroscopy , optics , fourier transform infrared spectroscopy , extreme ultraviolet , atomic physics , astronomy , laser , ion , argon , quantum mechanics , atomic absorption spectroscopy
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 Å), the strongest having wavelength uncertainties less than one part in 10 7 , are presented.