论文标题
调查升级的阿尔玛的未来潜力，以形成磁盘，以sub-au量表形成磁盘
Investigating the Future Potential of an Upgraded ALMA to Image Planet Forming Disks at Sub-au Scales
论文作者
论文摘要
近年来，阿尔玛（Alma）能够观察到原行星磁盘内的大规模子结构。与行星磁盘相互作用模型的预测进行比较表明，这些磁盘子结构中的大多数可以通过存在Neptune或更大的轨道半径（约5-100 $ au）的行星或更大的行星来解释。需要更好的分辨率来观察靠近恒星的结构，在该恒星中预计会形成陆地行星，以及质量低于海王星的行星打开的结构。我们调查了可能扩展到ALMA的功能，该功能将使阵列中最长的基线长度翻倍，以检测和解决由轨道半径为$ 1-5 $ au的地球质量和超级地球行星开放的磁盘子结构。通过使用ALMA频段6和7中这种扩展配置对磁盘模型的观察结果，我们表明，升级后的ALMA将检测到近地球的磁盘中的差距，最接近1 au，而地球质量的行星以及附近的年轻宿主星星的年轻宿主星星的$ 2-3 $ au。
In recent years, ALMA has been able to observe large-scale substructures within protoplanetary disks. Comparison with the predictions from models of planet-disk interaction has indicated that most of these disk substructures can be explained by the presence of planets with the mass of Neptune or larger at orbital radii of $\approx 5 - 100$ au. Better resolution is needed to observe structures closer to the star, where terrestrial planets are expected to form, as well as structures opened by planets with masses lower than Neptune. We investigate the capabilities of a possible extension to ALMA that would double the longest baseline lengths in the array to detect and resolve disk substructures opened by Earth-mass and Super Earth planets at orbital radii of $1-5$ au. By simulating observations of a family of disk models using this extended configuration in ALMA Bands 6 and 7, we show that an upgraded ALMA would detect gaps in disks formed by super-Earths as close as 1 au, as well as Earth-mass planets down to $2-3$ au from the young host stars in nearby star forming regions.
