超接触双星NSVS2910034的光度研究

IF 1.9 4区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS New Astronomy Pub Date : 2024-02-28 DOI:10.1016/j.newast.2024.102210

R. Wes Tobin , Robert C. Berrington

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引用次数: 0

摘要

我们展示了对食双星系统 NSVS 2910034 的 BVRC+TESS 差分光度测量。周期分析发现了与系统轨道周期变化不一致的异常变化，可能是由于表面活动造成的。最佳拟合模型与 W 型 W UMa 超接触双星一致，由一颗质量较小的 G7 光谱型恒星和一颗质量较大的 K1 光谱型恒星组成。奥康纳尔效应存在并得到了分析。最佳拟合模型代表了一个非常大的热点，这可能表明在 K 星的大部分恒星表面都有显著的色球活动。

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Photometric study of the overcontact binary NSVS2910034

We present BVR $_{C}$ +TESS differential photometry of an eclipsing binary system NSVS 2910034. A period analysis reveals unusual variations that are inconsistent with systemic orbital period changes and may be due to surface activity. The best fit models are consistent with a W-type W UMa overcontact binary, consisting of a less massive G7 spectral type star and a more massive K1 spectral type star. An O’Connell effect is present and analyzed. The best fit model represents a very large hot spot that may indicate significant chromospheric activity across a large portion of the stellar surface of the K star.

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来源期刊

New Astronomy 地学天文-天文与天体物理

CiteScore

4.00

自引率

10.00%

发文量

109

审稿时长

13.6 weeks

期刊介绍： New Astronomy publishes articles in all fields of astronomy and astrophysics, with a particular focus on computational astronomy: mathematical and astronomy techniques and methodology, simulations, modelling and numerical results and computational techniques in instrumentation. New Astronomy includes full length research articles and review articles. The journal covers solar, stellar, galactic and extragalactic astronomy and astrophysics. It reports on original research in all wavelength bands, ranging from radio to gamma-ray.