HX Velorum: Ellipsoidal/Rotational Binary With β Cep Type Component

IF 1.1 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Astronomische Nachrichten Pub Date : 2024-10-08 DOI:10.1002/asna.20240028

B. Gürol

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引用次数: 0

Abstract

We present the Transiting Exoplanet Survey Satellite (TESS) light curve analysis of HX Velorum, located in the Southern Hemisphere, where one of the components is found for the first time to be a $β$ Cep (BCEP) type pulsator. The TESS observations of HX Velorum were published in a total of 6 sectors. Fourier analysis of the observations reveals that the frequencies can be divided into two categories, one of which is related to the orbital period and the other related to the $β$ Cep-type pulsation. Its non-eclipsing light curve was analyzed with the well-known Wilson–Devinney code, and we obtained the geometric and physical parameters of the components using published radial velocity and light curve data by making some assumptions. We obtained plausible masses and radii of the primary and secondary components as $M_{1} = 9.48 \pm 0.27 M_{⊙}$ , $M_{2} = 5.92 \pm 0.17 M_{⊙}$ and $R_{1} = 3.93 \pm 0.04 R_{⊙}$ , $R_{2} = 3.59 \pm 0.03 R_{⊙}$ , respectively. The obtained system's distance of $\sim 400$ pc is smaller than the Gaia distances found in the literature.

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HX Velorum带有 β Cep 型成分的椭球/旋转双星

我们展示了 Transiting Exoplanet Survey Satellite（TESS）对位于南半球的 HX Velorum 星的光变曲线分析，首次发现其中的一个成分是一个 β$ \beta$ Cep（BCEP）型脉动器。TESS 对 HX Velorum 的观测共发布了 6 个扇区。对观测数据的傅立叶分析表明，其频率可分为两类，一类与轨道周期有关，另一类与 β $ \beta $ Cep 型脉动有关。我们用著名的威尔逊-德文尼（Wilson-Devinney）代码分析了它的非彗星光曲线，并通过一些假设，利用已公布的径向速度和光曲线数据，获得了各组成部分的几何和物理参数。我们得到的主、副成分的质量和半径分别为 M 1 = 9.48 ± 0.27 M ⊙ $$ {M}_1=9.48\pm 0.27{M}_\{odot }$ ，M 2 = 5.48 ± 0.27 M ⊙ $$ {M}_1=9.48\pm 0.27{M}_\{odot }$ 。$$ , M 2 = 5.92 ± 0.17 M ⊙ $ $ {M}_2=5.92\pm 0.17{M}_{\odot }$ 和 R 1 = 3.92 ± 0.17 M ⊙ $ {M}_2=5.92\pm 0.17{M}_{\odot }$ 。$$ 和 R 1 = 3.93 ± 0.04 R ⊙ $$ {R}_1=3.93\pm 0.04{R}_{\odot }.$$ , R 2 = 3.59 ± 0.03 R ⊙ $$ {R}_2=3.59\pm 0.03{R}_{\odot }.分别为 $$ 。得到的系统距离为 ∼ 400 $ \sim 400 $ pc，小于文献中发现的盖亚距离。

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来源期刊

Astronomische Nachrichten 地学天文-天文与天体物理

CiteScore

1.80

自引率

11.10%

发文量

审稿时长

4-8 weeks

期刊介绍： Astronomische Nachrichten, founded in 1821 by H. C. Schumacher, is the oldest astronomical journal worldwide still being published. Famous astronomical discoveries and important papers on astronomy and astrophysics published in more than 300 volumes of the journal give an outstanding representation of the progress of astronomical research over the last 180 years. Today, Astronomical Notes/ Astronomische Nachrichten publishes articles in the field of observational and theoretical astrophysics and related topics in solar-system and solar physics. Additional, papers on astronomical instrumentation ground-based and space-based as well as papers about numerical astrophysical techniques and supercomputer modelling are covered. Papers can be completed by short video sequences in the electronic version. Astronomical Notes/ Astronomische Nachrichten also publishes special issues of meeting proceedings.