论文标题
两个VLM二进制文件的检测和表征：LP 1033-31和LP 877-72
Detection and characterisation of two VLM binaries: LP 1033-31 and LP 877-72
论文作者
论文摘要
使用非常大型望远镜的NACO仪器的高分辨率近红外自适应光学成像，我们报告了M-Dwarf LP 1033-31的新二元伴侣的发现，并确认LP 877-72的二进制。我们已经表征了恒星系统，并估计了其各个组件的特性。我们发现，M4.5+M4.5的光谱类型的LP 1033-31 AB的预计分离为6.7 $ \ pm $ 1.3 au。而使用M1+M4的光谱类型，LP 877-72 AB的预计分离估计为45.8 $ \ pm $ 0.3 au。发现LP 1033-31 AB的二进制伴侣具有相似的质量，半径，有效的温度和日志$ G $，其估计值为0.20 $ \ pm $ 0.04 $ \ rm {m} _ {\ odot} $，0.22 $，0.22 $ \ pm $ \ pm $ 0.03 $ \ 0.03美元5.06 $ \ pm $ 0.04。但是，发现LP 877-72 AB的主要质量是次级的两倍，其派生质量为0.520 $ \ pm $ 0.006 $ \ rm {m} _ {\ odot} $。发现LP 877-72 AB的初级的半径和日志$ G $是次要组件的1.8和0.95倍，其估计值为0.492 $ \ pm $ 0.011 $ \ rm {r} _ {\ odot} $和4.768 $ \ pm $ 0.005。 LP 877-72 AB的主要温度为3750 $ \ pm $ 15 K，据估计，$ \ sim $ \ sim $ 400 k的热量比次要组件高。我们还估计，LP 1033-31和LP 877-72的轨道周期分别为$ \ sim $ 28和$ \ sim $ 349年。发现两个系统的绑定能为$ \ gt $ 10 $^{43} $ erg，这表示两个系统都是稳定的。
Using the high-resolution near-infrared adaptive optics imaging from the NaCo instrument at the Very Large Telescope, we report the discovery of a new binary companion to the M-dwarf LP 1033-31 and also confirm the binarity of LP 877-72. We have characterised both the stellar systems and estimated the properties of their individual components. We have found that LP 1033-31 AB with the spectral type of M4.5+M4.5 has a projected separation of 6.7$\pm$1.3 AU. Whereas with the spectral type of M1+M4, the projected separation of LP 877-72 AB is estimated to be 45.8$\pm$0.3 AU. The binary companions of LP 1033-31 AB are found to have similar masses, radii, effective temperatures, and log $g$ with the estimated values of 0.20$\pm$0.04 $\rm{M}_{\odot}$, 0.22$\pm$0.03 $\rm{R}_{\odot}$, 3200 K, 5.06$\pm$0.04. However, the primary of LP 877-72 AB is found to be twice as massive as the secondary with the derived mass of 0.520$\pm$0.006 $\rm{M}_{\odot}$. The radius and log $g$ for the primary of LP 877-72 AB are found to be 1.8 and 0.95 times that of the secondary component with the estimated values of 0.492$\pm$0.011 $\rm{R}_{\odot}$ and 4.768$\pm$0.005, respectively. With an effective temperature of 3750$\pm$15 K, the primary of LP 877-72 AB is also estimated to be $\sim$400 K hotter than the secondary component. We have also estimated the orbital period of LP 1033-31 and LP 877-72 to be $\sim$28 and $\sim$349 yr, respectively. The binding energies for both systems are found to be $\gt$10$^{43}$ erg, which signifies both systems are stable.
