• Spectroscopic Variability of Supergiant Star HD14134, B3Ia

• # Fulltext

https://www.ias.ac.in/article/fulltext/joaa/038/02/0020

• # Keywords

HD14134 supergiant; spectroscopy; line profile variability.

• # Abstract

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.

• # Author Affiliations

1. Shamakhy Astrophysical Observatory, Azerbaijan National Academy of Sciences, Yu. Mammadaliyev Settlement, Shamakhy District, Republic of Azerbaijan.

• # Journal of Astrophysics and Astronomy

Current Issue
Volume 40 | Issue 4
August 2019

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