B-emission Stars in Southern Sky Observed in Bosscha Observatory: Spectroscopic Study of Hα Spectral Line Variability
| Autor: | Aprilia Aprilia, Hakim Luthfi Malasan, Geavani Eva Ramadhania, Agus Triono Puri Jatmiko, Mochamad Irfan, Dhimaz Gilang Ramadhan, Ade Nur Istiqomah, Evan Irawan Akbar |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Journal of Mathematical and Fundamental Sciences, Vol 51, Iss 3, Pp 243-251 (2019) |
| Druh dokumentu: | article |
| ISSN: | 2337-5760 2338-5510 |
| DOI: | 10.5614/j.math.fund.sci.2019.51.3.3 |
| Popis: | Hα line variations of 8 B-emission (Be) stars are presented. Stars that are listed in the Bright Star Catalogue were observed in 2009 at the Bosscha Observatory, Lembang, Indonesia. It was found that 4 stars showed phase changing from Be double-peaked to Be single-peaked emission line profiles, 1 showed single-peaked to double-peaked profiles, 1 showed double-peaked to B-normal, while two other stars did not show phase changing. The stars also showed variations in the V/R and E/C values, which represent the strength of the emission lines. The phase changes were detected from a comparison of the observed data to the current data in the BeSS database. |
| Databáze: | Directory of Open Access Journals |
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