Journal of Mathematical and Fundamental Sciences
Vol. 51 No. 3 (2019)

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

Aprilia Aprilia (Department of Astronomy, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132, Indonesia Bosscha Observatory, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Peneropon)
Hakim Luthfi Malasan (Department of Astronomy, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132, Indonesia Bosscha Observatory, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Peneropon)
Geavani Eva Ramadhania (Department of Astronomy, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132, Indonesia Bosscha Observatory, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Peneropon)
Agus Triono Puri Jatmiko (Department of Astronomy, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132, Indonesia Bosscha Observatory, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Peneropon)
Mochamad Irfan (Department of Astronomy, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132, Indonesia Bosscha Observatory, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Peneropon)
Dhimaz Gilang Ramadhan (Department of Astronomy, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132, Indonesia Bosscha Observatory, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Peneropon)
Ade Nur Istiqomah (Department of Astronomy, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132, Indonesia Bosscha Observatory, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Peneropon)
Evan Irawan Akbar (Department of Astronomy, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132, Indonesia Bosscha Observatory, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Peneropon)

Article Info

Publish Date
31 Dec 2019

Abstract

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.

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Journal Info
Journal of Mathematical and Fundamental Sciences
Website

Abbrev

jmfs

Publisher

Institut Teknologi Bandung

Subject

Astronomy Chemistry Earth & Planetary Sciences Mathematics Physics

Description

Journal of Mathematical and Fundamental Sciences welcomes full research articles in the area of Mathematics and Natural Sciences from the following subject areas: Astronomy, Chemistry, Earth Sciences (Geodesy, Geology, Geophysics, Oceanography, Meteorology), Life Sciences (Agriculture, Biochemistry, ...