Open AccessRecurring Nova RS Oph spectroscopic observation at Bosscha Observatory and ITERA Astronomical Observatory (IAO)
Author(s) -
Irfan Imaduddin,
Muhammad Fajrin,
Robiatul Muztaba,
I. Hafizah,
Evan Irawan Akbar,
Hakim L. Malasan
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2214/1/012012
Subject(s) - observatory , spectrograph , physics , astrophysics , balmer series , telescope , spectral line , astronomy , emission spectrum
We report low and intermediate resolution spectra of the recurrent nova RS Oph taken at two observatories. A low resolution spectrum ( R ≈ 1000) was taken at ITERA Astronomical Observatory (IAO) in Lampung by using 25 cm (f/8) RC Astrograph telescope equipped with a LISA Pack Spectrograph eight days after the outburst. Twenty intermediate spectra ( R ≈ 5000) were taken on several consecutive nights using LHIRES III spectrograph attached to a 25 cm (f/10) Meade LX-200R telescope at Bosscha Observatory, Lembang. We identified significant change in the strength of atomic lines from low resolution spectrum compared to previous observations. A clear and distinct Balmer emission decrement can be seen from the spectrum. Our intermediate resolution spectroscopy revealed a variability of P-Cygni profile on a broad H α line. The P-Cygni profile evolved and disappeared at recent observations. It is thought that there was a new shell formed after the outburst and later combined with the previous shell in the next days. From the broad H α profile, we measured and found decreasement in expansion velocity during our observation. We estimated v exp = 2907.97 ± 64.14 km/s and v exp = 997.12 ± 8.18 km/s on 1.6440 and 22.729 days after the outburst, respectively.