论文标题
观察使用METIS的磁盘
Observing Circumplanetary Disks with METIS
论文作者
论文摘要
环境：对行星和月球形成过程的充分理解需要观察，以探测积聚巨型行星的环境。中红外ELT成像仪和光谱仪（METIS）将提供独特的能力，以检测来自圆周磁盘的温暖气体发射线。目的：我们旨在在极大的望远镜（ELT）上证明Metis仪器的能力，以检测基本v = 1-0的$^{12} $ CO的磁盘（CPD），从4.5-5 $μ$ m。方法：我们考虑了经过良好研究的HD 100546前磁盘的情况，以告知我们的磁盘建模方法。我们使用辐射热化学磁盘建模代码生产代码来产生合成光谱通道图。观测模拟器Simmetis用于生产具有积分场光谱（IFU）模式的逼真的数据产品。结果：CPD的可检测性在很大程度上取决于外部照射水平和磁盘的物理范围，有利于巨大的（〜10 m $ _ {\ rm j} $）行星和空间扩展圆盘，而半径接近行星山半径。 $^{12} $ CO线排放的大部分源自外磁盘表面，因此CO线轮廓是中央峰的。行星光度并没有对令人兴奋的磁盘气线发射产生重大贡献。如果CPD被排除在粉尘中，则$^{12} $ CO线的发射会增强，因为外部辐射可以更深地渗透到发射区域。结论：带有前磁盘的UV-Bright Star系统是搜索与ELT/Metis共同发射CPD的理想候选者。 METIS将能够通过其基本$^{12} $ co Ro-Ro-co Ro-co Ro-co Ro-co-Ro-co Ro-co Ro-co-Ro-co Ro-co振动线排放量仅在总检测器集成时间的60秒内检测到各种磁盘。
Context: A full understanding of the planet and moon formation process requires observations that probe the circumplanetary environment of accreting giant planets. The mid-infrared ELT imager and spectrograph (METIS) will provide a unique capability to detect warm-gas emission lines from circumplanetary disks. Aims: We aim to demonstrate the capability of the METIS instrument on the Extremely Large Telescope (ELT) to detect circumplanetary disks (CPDs) with fundamental v=1-0 transitions of $^{12}$CO from 4.5-5 $μ$m. Methods: We consider the case of the well-studied HD 100546 pre-transitional disk to inform our disk modeling approach. We use the radiation-thermochemical disk modeling code ProDiMo to produce synthetic spectral channel maps. The observational simulator SimMETIS is employed to produce realistic data products with the integral field spectroscopic (IFU) mode. Results: The detectability of the CPD depends strongly on the level of external irradiation and the physical extent of the disk, favoring massive (~10 M$_{\rm J}$) planets and spatially extended disks with radii approaching the planetary Hill radius. The majority of $^{12}$CO line emission originates from the outer disk surface, and thus the CO line profiles are centrally peaked. The planetary luminosity does not contribute significantly to exciting disk gas line emission. If CPDs are dust-depleted, the $^{12}$CO line emission is enhanced as external radiation can penetrate deeper into the line emitting region. Conclusions: UV-bright star systems with pre-transitional disks are ideal candidates to search for CO-emitting CPDs with ELT/METIS. METIS will be able to detect a variety of circumplanetary disks via their fundamental $^{12}$CO ro-vibrational line emission in only 60 s of total detector integration time.
