ISO-Oph 2 is a wide-separation (240 au) binary system where the primary star harbors a massive (M _dust∼40 M _⊕) ring-like disk with a dust cavity ∼50 au in radius and the secondary hosts a much lighter (M _dust∼0.8 M _⊕) disk. As part of the high-resolution follow-up of the “Ophiuchus Disk Survey Employing ALMA” (ODISEA) project, we present 1.3 mm continuum and ¹²CO molecular line observations of the system at 002 (3 au) resolution. We resolve the disk around the primary into two nonaxisymmetric rings and find that the disk around the secondary is only ∼7 au across and also has a dust cavity (r∼2.2 au). Based on the infrared flux ratio of the system and the M0 spectral type of the primary, we estimate the mass of the companion to be close to the brown-dwarf limit. Hence, we conclude that the ISO-Oph 2 system contains the largest and smallest cavities, the smallest measured disk size, and the resolved cavity around the lowest-mass object (M _⋆∼0.08 M _⊙) in Ophiuchus. From the ¹²CO data, we find a bridge of gas connecting both disks. While the morphology of the rings around the primary might be due to an unseen disturber within the cavity, we speculate that the bridge might indicate an alternative scenario in which the secondary has recently flown by the primary star causing the azimuthal asymmetries in its disk. The ISO-Oph 2 system is therefore a remarkable laboratory to study disk evolution, planet formation, and companion–disk interactions.

ISO-Oph 2 是一个宽间距 (240 au) 双星系统，其中主星拥有一个巨大的（M _尘埃∼40 M _⊕）环状盘，尘埃腔半径约 50 au，而次要星则轻得多( M _尘∼0.8 M _⊕ ) 盘。作为“采用 ALMA 的蛇夫座圆盘调查”（ODISEA）项目的高分辨率后续行动的一部分，我们以 002（3 au）的分辨率展示了该系统的1.3 mm 连续谱和¹² CO 分子线观测。我们将初级周围的圆盘分解为两个非轴对称环，发现次级周围的圆盘只有约 7 au 跨度，并且还有一个尘腔（r∼2.2 au)。根据系统的红外通量比和主星的 M0 光谱类型，我们估计伴星的质量接近棕矮星极限。因此，我们得出结论，ISO-Oph 2 系统包含最大和最小的空腔、最小的测量圆盘尺寸以及围绕蛇夫座中质量最低的物体 ( M _⋆ ∼0.08 M _⊙ )的解析空腔。从¹²CO 数据，我们发现连接两个圆盘的气体桥。虽然主星周围环的形态可能是由于腔内看不见的干扰物，但我们推测这座桥可能表明了另一种情况，其中次星最近被主星飞行，导致其圆盘中的方位角不对称。因此，ISO-Oph 2 系统是研究盘演化、行星形成和伴盘相互作用的卓越实验室。