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Laboratory Spectroscopy of Neutral Scandium, Sc I, for Astrophysical Applications

Pehlivan, Asli LU (2012) In Lund Observatory Examensarbeten ASTM31 20121
Lund Observatory
Department of Astronomy and Theoretical Physics
Abstract
Most of the things that we know about stars come from their spectrum. The properties of the atomic lines, e.g. energy levels, wavelengths, oscillator strengths, must be known to understand the observed spectrum and to perform quantitative analyses. Atomic data of some elements are incomplete, especially in the near-infrared region, which makes it difficult or even impossible to analyze a stellar spectrum or do abundance analysis. The purpose of this master project is to investigate the spectrum of neutral scandium, Sc I, from laboratory measurements and to improve the atomic data of Sc I ions. A hollow cathode discharge lamp (HCL) is usedto produce the spectra of scandium and a Fourier transform spectrometer (FTS) is used to record the... (More)
Most of the things that we know about stars come from their spectrum. The properties of the atomic lines, e.g. energy levels, wavelengths, oscillator strengths, must be known to understand the observed spectrum and to perform quantitative analyses. Atomic data of some elements are incomplete, especially in the near-infrared region, which makes it difficult or even impossible to analyze a stellar spectrum or do abundance analysis. The purpose of this master project is to investigate the spectrum of neutral scandium, Sc I, from laboratory measurements and to improve the atomic data of Sc I ions. A hollow cathode discharge lamp (HCL) is usedto produce the spectra of scandium and a Fourier transform spectrometer (FTS) is used to record the spectra. The high resolution, intensity calibrated spectra are used to derive accurate laboratory wavelengths and oscillator strengths for Sc I lines, with emphasis on the infrared region 0.7-5 microm. This is the spectral region covered by recent astronomical observatories, e.g. RIRES at VLT, and also the next generation telescopes. The present work provide a set of experimental Sc I lines in the infrared region for accurate spectral analysis of astronomical objects. (Less)
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author
Pehlivan, Asli LU
supervisor
organization
course
ASTM31 20121
year
type
H2 - Master's Degree (Two Years)
subject
publication/series
Lund Observatory Examensarbeten
report number
2012-EXA65
language
English
id
3158808
date added to LUP
2012-10-29 13:30:46
date last changed
2012-10-29 13:30:46
@misc{3158808,
  abstract     = {Most of the things that we know about stars come from their spectrum. The properties of the atomic lines, e.g. energy levels, wavelengths, oscillator strengths, must be known to understand the observed spectrum and to perform quantitative analyses. Atomic data of some elements are incomplete, especially in the near-infrared region, which makes it difficult or even impossible to analyze a stellar spectrum or do abundance analysis. The purpose of this master project is to investigate the spectrum of neutral scandium, Sc I, from laboratory measurements and to improve the atomic data of Sc I ions. A hollow cathode discharge lamp (HCL) is usedto produce the spectra of scandium and a Fourier transform spectrometer (FTS) is used to record the spectra. The high resolution, intensity calibrated spectra are used to derive accurate laboratory wavelengths and oscillator strengths for Sc I lines, with emphasis on the infrared region 0.7-5 microm. This is the spectral region covered by recent astronomical observatories, e.g. RIRES at VLT, and also the next generation telescopes. The present work provide a set of experimental Sc I lines in the infrared region for accurate spectral analysis of astronomical objects.},
  author       = {Pehlivan, Asli},
  language     = {eng},
  note         = {Student Paper},
  series       = {Lund Observatory Examensarbeten},
  title        = {Laboratory Spectroscopy of Neutral Scandium, Sc I, for Astrophysical Applications},
  year         = {2012},
}