B-emission Stars in Southern Sky Observed in Bosscha Observatory: Spectroscopic Study of Hα Spectral Line Variability

• Main Authors: Aprilia Aprilia, Hakim Luthfi Malasan, Geavani Eva Ramadhania, Agus Triono Puri Jatmiko, Mochamad Irfan, Dhimaz Gilang Ramadhan, Ade Nur Istiqomah, Evan Irawan Akbar
• Format: Article
• Language: English
• Published: ITB Journal Publisher 2019-12-01
• Series: Journal of Mathematical and Fundamental Sciences
• Subjects: be–methods; emission line; line profiles – stars; spectroscopy
• Online Access: http://journals.itb.ac.id/index.php/jmfs/article/view/5877

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.