Solar-like oscillations and ellipsoidal variations in TESS observations of the binary 12 Boötis

Solar-like oscillations and ellipsoidal variations in TESS observations of the binary 12 Boötis
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双星 12 Boátis 的 TESS 观测中的类太阳振荡和椭球变化

DOI:
10.1093/mnras/stac2212
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发表时间:
2022
影响因子:
4.8
通讯作者:
Ball W
Ball W
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Ball W

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可以研究其中一个或两个组成部分的振荡的双星可以为我们对恒星物理的理解提供强有力的限制。明亮的双星 12 Boötis (12 Boo) 是一个特别有前途的系统,因为尽管主星的质量只比副星高出百分之几,但它的亮度大约是 60%。两颗恒星都有大量的表面对流区,因此可能是类似太阳的振荡器。我们在此报告了首次检测到 12 Boo 的 TESS 光变曲线中的类太阳振荡和椭球体变化。尽管类太阳振荡还不够清晰,无法明确测量各个模式频率,但我们结合了全局星震参数和对光谱能量分布(SED)的精确拟合,为系统特性提供了新的约束,该约束比文献中的值精确数倍。 SED 拟合单独提供了 12 Boo A 和 12 Boo B 的新有效温度、光度和半径。当与 12 Boo A 的星震约束相结合时,我们得到的年龄为 ,这与 12 Boo B 的年龄一致。
Binary stars in which oscillations can be studied in either or both components can provide powerful constraints on our understanding of stellar physics. The bright binary 12 Boötis (12 Boo) is a particularly promising system because the primary is roughly 60 per cent brighter than the secondary despite being only a few per cent more massive. Both stars have substantial surface convection zones and are therefore, presumably, solar-like oscillators. We report here the first detection of solar-like oscillations and ellipsoidal variations in the TESS light curve of 12 Boo. Though the solar-like oscillations are not clear enough to unambiguously measure individual mode frequencies, we combine global asteroseismic parameters and a precise fit to the spectral energy distribution (SED) to provide new constraints on the properties of the system that are several times more precise than values in the literature. The SED fit alone provides new effective temperatures, luminosities, and radii of,, andfor 12 Boo A and,, andfor 12 Boo B. When combined with our asteroseismic constraints on 12 Boo A, we obtain an age of, which is consistent with that of 12 Boo B.
渥太华多明尼恩天文台出版物,第 28 卷
DOI: 10.4095/315645
发表时间: 1966
期刊: --
影响因子: --
作者:
D. Observatory
通讯作者: D. Observatory
DOI: 10.1051/978-2-7598-1876-1
发表时间: 2016
期刊: Research Notes of the AAS
影响因子: --
作者:
A. Baglin
通讯作者: A. Baglin