کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1778800 1523733 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
V2653 Ophiuchii with a pulsating component and Ppuls – Porb, Ppuls – g correlations for γ Dor type pulsators
ترجمه فارسی عنوان
V2653 Ophiuchii با پالس دار کردن اجزا و همبستگی های Ppuls-Porb، Ppuls-g برای پالس سازهای نوع γ Dor
کلمات کلیدی
ستاره ها: پارامترهای اساسی؛ فردی: V2653 Oph؛ باینری: کسوف
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم نجوم و فیزیک نجومی
چکیده انگلیسی


• We present new spectroscopic observations of binary V2653 Oph.
• We estimate the membership of the open cluster Collinder 359.
• Using the photometric data we have made frequency analysis.
• We find empirical relations that Ppuls Porb and Ppuls log g.
• We present the underlying physics behind the correlations.

We present new spectroscopic observations of the double-lined eclipsing binary V2653 Ophiuchii. The photometric observations obtained by ASAS were analyzed and combined with the analysis of radial velocities for deriving the absolute parameters of the components. Masses and radii were determined for the first time as Mp = 1.537 ± 0.021 M⊙ and Rp = 2.215 ± 0.055 R⊙, Ms = 1.273 ± 0.019 M⊙ and Rs = 2.000 ± 0.056 R⊙ for the components of V2653 Oph. We estimate an interstellar reddening of 0.15 ± 0.08 mag and a distance of 300 ± 50 pc for the system, both supporting the membership of the open cluster Collinder 359. Using the out-of-eclipse photometric data we have made frequency analysis and detected a periodic signal at 1.0029 ± 0.0019 c/d. This frequency and the location of the more massive star on the HR diagram lead to classification of a γ Dor type variable. Up to date only eleven γ Dor type pulsators in the eclipsing binaries have been discovered. For six out of 11 systems, the physical parameters were determined. Although a small sample, we find empirical relations that Ppuls   ∝ Porb0.43 and Ppuls   ∝ g−0.83g−0.83. While the pulsation periods increase with longer orbital periods, they decrease with increasing surface gravities of pulsating components and gravitational pull exerted by the companions. We present, briefly, the underlying physics behind the correlations we derived.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: New Astronomy - Volume 45, May 2016, Pages 36–44
نویسندگان
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