过接触二元HH Boo的绝对性质
Absolute Properties of An Overcontact Binary HH Boo
摘要:
我们获得了HH Boo的多色光变曲线。分析了系统的轨道周期变化。分析表明,可能存在从第二组件到主要组件的质量传递或质量损失,每年约为-5.04x10-7 Msun。重新分析现有的径向速度曲线,我们分析了光变曲线。发现系统的倾角(i)为69.71(0.16)度,而半长轴(a)计算为2.246(0.064)Rsun。发现主要组分的质量为0.92(0.08)Msun,而次要组分的质量为0.58(0.06)Msun。主要部件的半径计算为0.98(0.03)Rsun,而次要部件的半径计算为0.80(0.02)Rsun。我们证明了HH Boo应该是W UMa双星A型子类的成员。
英文摘要:
We obtained multi-colour light curves of HH Boo. We analysed the orbital period variation of the system. The analysis indicated that there is possible mass transfer from the second component to the primary or mass loss with -5.04x10-7 Msun per year. Re-analysing the available radial velocity curve, we analysed the light curves. The inclination (i) of the system was found to be 69.71(0.16) deg, while the semi-major axis (a) was computed as 2.246(0.064) Rsun. The mass of the primary component was found to be 0.92(0.08) Msun, while it was obtained as 0.58(0.06) Msun for the secondary component. The radius of the primary component was computed as 0.98(0.03) Rsun, while it was computed as 0.80(0.02) Rsun for the secondary component. We demonstrated that HH Boo should be a member of the A-type subclass of W UMa binaries.
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