Stellar parameters and seismological analysis of the star 18 Scorpii
Stellar parameters and seismological analysis of the star 18 Scorpii
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DOI：
10.1051/0004-6361/201219063
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发表时间：
2012-10
影响因子：
6.5
通讯作者：
T. Li;S. Bi;K. Liu;Z. Tian;G. Z. Shuai
中科院分区：
文献类型：
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作者：
T. Li;S. Bi;K. Liu;Z. Tian;G. Z. Shuai
目标。我们建立了恒星结构和演化的模型，包括旋转引起的扩散和额外混合，以估计太阳双星天蝎座18的恒星参数。方法.基于经典的观察特征，我们考虑了三个额外的约束，即，锂丰度logN（Li）、自转周期Peq和平均大频率间隔ω v，结合恒星模型和观测资料，确定了天蝎座18颗恒星的恒星参数和可能的演化状态。结果我们的模型比以前的研究发现更准确的质量和年龄的结果。我们估计，
Aims. We constructed models of the structure and evolution of the stars including diffusion and extra-mixing caused by rotation to estimate stellar parameters of the solar twin 18 Scorpii. Methods. Based on the classical observed features, we considered three additional constraints, i.e., lithium abundance log N(Li), rotational period P eq, and average large frequency separation �� ν� , by combing stellar models with observations to determine stellar parameters and the possible evolutionary status of 18 Scorpii. Results. More accurate results of mass and age were found by our model than in previous studies. We estimate that the mass and