Hα Line Variations in the Herbig Ae Type Star HD179218
| Autor: | N. Z. Ismailov, A. N. Adigezalzade, U. Z. Bashirova |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Accretion (meteorology) Be star Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Star (graph theory) 01 natural sciences 03 medical and health sciences Stars T Tauri star 0302 clinical medicine 030225 pediatrics 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Polar Binary system 010303 astronomy & astrophysics Instrumentation Astrophysics::Galaxy Astrophysics Line (formation) |
| Zdroj: | Astrophysical Bulletin. 74:300-307 |
| ISSN: | 1990-3421 1990-3413 |
| DOI: | 10.1134/s1990341319030076 |
| Popis: | We present the results of spectral observations of the Herbig Ae/Be star HD179218. We discovered a wave-like variation in the parameters of the Hα line emission component with a typical time scale of about 40 days. The observed wave is characterized by a significant decrease in the measured line parameters, with conspicuous branches of increasing and decreasing parameters. Simultaneously, additional blue and red emission and absorption components appear and disappear in the Hα line profile during the moment of minimum. The observed variations in the spectrum of the star may be explained by the existence of polar winds and accretion, or by assuming that the star is a binary system. |
| Databáze: | OpenAIRE |
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