论文标题
发现与VLT/Sphere的年轻大型恒星MWC 297的磁盘中嵌入的低质量同伴
Discovery of a low-mass companion embedded in the disk of the young massive star MWC 297 with VLT/SPHERE
论文作者
论文摘要
我们报告了在年轻的Herbig Be Be Star MWC 297周围发现的低质量恒星伴侣。我们在近红外（NIR）中进行了多上焦点高对比度成像，并使用非常大的望远镜（VLT）/Spectro-Polarimetrimetric polarimetric高对比度ePlanet exoplanet Research（Sphere）仪表进行了多个。该伴侣的预计分离为244.7 $ \ pm $ 13.2 au，位置角度为176.4 $ \ pm $ 0.1度。大分离支持通过重力不稳定性形成。从频谱中，我们估计质量为0.1-0.5 m $ _ {\ odot} $，范围在同伴灭绝和年轻时代的进化模型中传达不确定性。轨道与从光谱能量分布（SED）推断的灰尘磁盘中的间隙相吻合。年轻的年龄（$ \ Lessim $ 1 MYR）和与中心星（$ \ sim 0.01 $）的质量比使伴侣与PDS 70〜B相当，这表明编队场景与磁盘动态之间存在关系。
We report the discovery of a low-mass stellar companion around the young Herbig Be star MWC 297. We performed multi-epoch high-contrast imaging in the near infrared (NIR) with the Very Large Telescope (VLT)/Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) instrument. The companion is found at projected separation of 244.7$\pm$13.2 au and a position angle of 176.4$\pm$0.1 deg. The large separation supports formation via gravitational instability. From the spectrum, we estimate a mass of 0.1-0.5 M$_{\odot}$, the range conveying uncertainties in the extinction of the companion and in evolutionary models at young ages. The orbit coincides with a gap in the dust disk inferred from the Spectral Energy Distribution (SED). The young age ($\lesssim$ 1 Myr) and mass ratio with the central star ($\sim 0.01$) makes the companion comparable to PDS 70~b, suggesting a relation between formation scenarios and disk dynamics.
