Time-series Spectroscopy of the Oscillating Eclipsing Algol System V392 Orionis
- Institute for Astrophysics, Chungbuk National University, Cheongju 28644 (Korea, Republic of)
- Korea Astronomy and Space Science Institute, Daejeon 34055 (Korea, Republic of)
- Department of Astronomy and Space Science, Chungnam National University, Daejeon 34134 (Korea, Republic of)
- Department of Astronomy and Space Science, Sejong University, Seoul 05006 (Korea, Republic of)
- National Astronomical Research Institute of Thailand, Chiang Mai 50200 (Thailand)
- Department of Physics, Chungbuk National University, Cheongju 28644 (Korea, Republic of)
We present the results from a detailed analysis of our high-resolution spectra and historical photometric observations of the semidetached eclipsing binary V392 Ori with a δ Scuti (δ Sct) pulsating component. A total of 31 spectroscopic observations were carried out at both the Bohyunsan Optical Astronomy Observatory in Korea and the Thai National Observatory in Thailand during the 2016 and 2017 observing seasons. The radial velocities (RVs) of the primary and the faint secondary components were determined, and the effective temperature and projected rotational velocity of the former star were measured as T {sub eff,1} = 8500 ± 160 K and v {sub 1} sin i = 148 ± 13 km s{sup −1}, respectively, through a comparison of the observed spectra and stellar atmosphere models. The physical properties of V392 Ori were determined by analysis of our RVs together with the existing multiband light curves. The results are the following: masses of M {sub 1} = 2.28 ± 0.30 M {sub ⊙} and M {sub 2} = 0.49 ± 0.10 M {sub ⊙}, and radii of R {sub 1} = 2.08 ± 0.09 R {sub ⊙} and R {sub 2} = 1.15 ± 0.05 R {sub ⊙}. The primary star located inside the main-sequence band exhibits a δ Sct-type pulsation. On the contrary, the less massive secondary component is significantly oversized and overluminous for its mass and temperature.
- OSTI ID:
- 22897244
- Journal Information:
- The Astronomical Journal (Online), Vol. 157, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-3881
- Country of Publication:
- United States
- Language:
- English
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