• Y. M. Y. M. Maharramov

      Articles written in Journal of Astrophysics and Astronomy

    • Spectroscopic Variability of Supergiant Star HD14134, B3Ia

      Y. M. Y. M. Maharramov

      More Details Abstract Fulltext PDF

      Profile variations in the ${H}\alpha$ and ${H}\beta$ lines in the spectra of the star HD14134 are investigated using observations carried out in 2013–2014 and 2016 with the 2-m telescope at the Shamakhy Astrophysical Observatory. The absorption and emission components of the ${H}\alpha$ line are found to disappear on some observational days, and two of the spectrograms exhibit inverse P-Cyg profile of ${H}\alpha$. It was revealed that when the ${H}\alpha$ line disappeared or an inversion of the P-Cyg-type profile is observed in the spectra, the ${H}\beta$ line is displaced to the longer wavelengths, but no synchronous variabilities were observed in other spectral lines (CII λ 6578.05 Å, λ 6582.88 Å and HeI λ 5875.72 Å) formed in deeper layers of the stellar atmosphere. In addition, the profiles of the ${H}\alpha$ and ${H}\beta$ lines have been analysed, as well as their relations with possible expansion, contraction and mixed conditions of the atmosphere of HD14134. We suggest that the observational evidence for the non-stationary atmosphere of HD14134 can be associated in part with the non-spherical stellar wind.

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