Some asymmetry of interstellar lines Na I λ 589.0 nm and Na I λ 589.6 nm in a spectrum of the Wolf-Rayet type star HD 192163
| 1Rustamov, DN, 1Abdulkerimova, AF 1Nasir al-Din al-Tusi Shamakhi Astrophysical Observatory, Pirqulu, Azerbaijan |
| Kinemat. fiz. nebesnyh tel (Online) 2015, 31(2):73- |
| Start Page: Physics of Stars and Interstellar Medium |
| Language: Russian |
Abstract: We present our results of spectral investigations of interstellar absorption lines of sodium Na I λ 589.0 nm (D2) and Na I λ 589.6 nm (D1) using 46 echelle-spectrograms of the Wolf-Rayet (WR) type star HD 192163. Eshelle-spectrograms were obtained with an echelle-spectrometer attached to the Cassegrain focus of the 2-m telescope of the N. Tusi Shamakhy Astrophysical Observatory (ShAO) of the National Academy of Sciences of Azerbaijan during 2005—2010. Four echelle-spectrograms of another WR type star HD 191765 and the standard star HD 18947 for the purpose of comparative investigations of Na I doublet lines in the spectra of these stars were obtained. Some asymmetry of profiles of interstellar absorption lines was revealed only in the spectrum of the star HD 192163. However, the profiles of these lines are symmetric enough in the spectra of the stars HD 191765 and HD 18947. The revealed asymmetry of Na I doublet lines in a spectrum of the star HD 192163 can be explained by the contribution of the nebula NGC 6888 genetically connected with the star to the formation of these lines. The equivalent width and radial velocities of Na I doublet lines were determined using echelle-spectrograms of the star HD 192163. |
| Keywords: HD 192163, interstellar lines |
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