Identification of absorption lines of rare-earth elements in the region of the spectrum λλ 610.25–610.57 nm roAp stars,HD 101065, HD 134214, HD 137949, and HD 24712 |
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| Authors: | N G Mykhailytska |
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| Institution: | 1.Main Astronomical Observatory,National Academy of Sciences of Ukraine,Kiev,Ukraine |
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| Abstract: | In the spectral region λλ = 610.25−610.57 nm of the roAp star HD 101065, we performed the identification of the rare-earth
element absorption lines absent from the atomic spectral line databases VALD and DREAM. The identified lines were used for
calculating the synthetic spectra of the roAp stars HD 137949, HD 134214, and HD 24712. The upper limit of the identified
line estimates was determined. The rotation/pulsation parameter νsini and magnetic field modulus were determined using the lines Nd III 669.083 nm and Ca I 616.217 nm. The element abundance in
the roAp stars HD 134214 and HD 24712 was determined for the first time using Nd III lines. Calculations were carried out
with the help of the code SynthM developed by S.A. Khan. |
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