论文标题
亮光谱二进制：I。五个系统的轨道参数，p <365天
Bright Spectroscopic Binaries: I. Orbital parameters of five systems with periods of P < 365 days
论文作者
论文摘要
在基于最近发表的Gaia〜DR2径向速度数据并使用机器人Tigre望远镜进行的良好搜索中，我们发现了19个Bright（$ M_V <7.66 $ 〜MAG）光谱二进制明星。我们介绍了其中五个恒星的径向速度曲线（HD〜20656，HD〜27259，HD〜98812，HD〜150600，HD〜193082），周期为$ P <365 $〜天。我们使用工具包RADVEL确定它们的轨道参数。使用ISPEC的观察到的中间分辨率光谱（$ r \ \ 20,000 $）确定了主要恒星的完整基本恒星参数（有效温度，表面重力，金属性，质量和年龄），并与ISPEC进行比较，并比较HRD与Stellar Evolution曲目的位置。所有五个主要恒星都已经演变为巨型阶段，并且具有低质量的次要阶段，这不会显着影响光谱。最后，我们确定了二元系统的次级恒星的最小质量，并就二元系统的性质得出了结论。
In a well-aimed search based on the recently published Gaia~DR2 radial velocity data and performed with the robotic TIGRE telescope, we have discovered 19 bright ($m_V<7.66$~mag) spectroscopic binary stars. We present the radial velocity curves of five of these stars (HD~20656, HD~27259, HD~98812, HD~150600, HD~193082) with periods of $P<365$~days. We determined their orbital parameters using the toolkit RadVel. The complete set of basic stellar parameters (effective temperature, surface gravity, metallicity, mass and age) of the primary stars are determined using the observed intermediate resolution spectra ($R\approx20,000$) with iSpec and a comparison of the position in the HRD with stellar evolution tracks. All five primary stars have already evolved to the giant phase and possess low-mass secondaries, which do not noticeably affect the spectra. Finally, we determined the minimum masses of the secondary stars of the binary systems and present conclusions about the properties of the binary systems.
