论文标题
首先在空间上解决了na i，我向我过渡了一个。为气态星/盘接口找到新的示踪剂
First spatially resolved Na I and He I transitions towards an MYSO. Finding new tracers for the gaseous star/disc interface
论文作者
论文摘要
随着稳定的观察进步，更详细地了解了大型恒星的形成。数值模型正在在积聚光盘起关键作用的情况下融合。由于此类物体的稀有性和观察性挑战，包括在近IR中缺乏足够的诊断线，因此在几个AU量表上进行此类光盘的直接观察证据很少。我们介绍了对大型年轻恒星物体IRAS 13481-6124对K频段的镜头式互化观测值的分析，该物体已知可以容纳一个积聚的尘土飞扬的碟片。使用VLTI上的重力，我们追踪恒星和积聚灰尘圆盘之间温暖内部界面的关键Au尺度。我们检测并在空间上解析了Na I Doublet，他第一次过渡到该课程的对象。结合我们的几何模型的新观察结果使我们能够探测MySO周围最小的积聚/射血量表。我们发现Na I源自圆盘的半径小于灰尘盘，并且比其他任何空间分辨的诊断（Br $γ$，He I和CO）更紧凑。我们的发现表明，NA我可以成为追踪形成（大型）星星的温暖恒星/圆盘吸收界面的新的强大诊断线，而He I和Br $umγ$之间的相似之处则指向他的积聚/射血源
With steady observational advances, the formation of massive stars is being understood in more detail. Numerical models are converging on a scenario where accretion discs play a key role. Direct observational evidence of such discs at a few au scales is scarce, due to the rarity of such objects and the observational challenges, including the lack of adequate diagnostic lines in the near-IR. We present the analysis of K-band spectro-interferometric observations toward the Massive Young Stellar Object IRAS 13481-6124, which is known to host an accreting dusty disc. Using GRAVITY on the VLTI, we trace the crucial au-scales of the warm inner interface between the star and the accretion dusty disc. We detect and spatially resolve the Na I doublet and He I transitions towards an object of this class for the first time. The new observations in combination with our geometric models allowed us to probe the smallest au-scales of accretion/ejection around an MYSO. We find that Na I originates in the disc at smaller radii than the dust disc and is more compact than any of the other spatially resolved diagnostics (Br$γ$, He I, and CO). Our findings suggest that Na I can be a new powerful diagnostic line in tracing the warm star/disc accreting interface of forming (massive) stars, while the similarities between He I and Br$γ$ point towards an accretion/ejection origin of He I
