DOI: https://doi.org/10.30970/jps.17.2903
ANOMALOUS ABUNDANCE OF RARE-EARTH ELEMENTS IN THE ATMOSPHERE OF roAp-STAR HD24712
N. G. Myhailytska
Main Astronomical Observatory of the National Academy of Sciences, Kyiv, UA--03683, Ukraine
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Journal of Physical Studies 17(2), Article 2903 [7 pages] (2013)
DOI: https://doi.org/10.30970/jps.17.2903 ANOMALOUS ABUNDANCE OF RARE-EARTH ELEMENTS IN THE ATMOSPHERE OF roAp-STAR HD24712N. G. Myhailytska Main Astronomical Observatory of the National Academy of Sciences, Kyiv, UA--03683, Ukraine |
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For the magnetic rapidly oscillating chemically peculiar star (roAp) HD 24712 on the spectra of highresolution the lines of rare-earth elements (REE) in the first and second stages of ionization were investigated. The previously established anomaly of the abundance of REE excess relative to solar one was confirmed. The results of the study of the abundance of REE in the atmosphere of roAp-star HD 24712 are given. The list of lines from the VALD database was supplemented with lines of rare-earth elements from the DREAM database. On the lines sensitive to magnetic field the parameter of rotation/pulsation $v\sin(i)$ and the module of a magnetic field and its components $B_{\rm r}$, $B_{\rm m}$ are defined.
PACS number(s): 97.30.Fi, 97.10.Ex, 97.10.Tk