AI 中文总结
利用詹姆斯·韦布空间望远镜近红外相机观测TW天琴座星协的TWA 10和TWA 25两个M矮星系统，发现TWA 10有已知最大的M矮星碎片盘，分析了TWA 25盘面特征，还发现一些潜在伴星候选体，揭示此前因光度低可能遗漏了一些M矮星盘面。
AI 中文摘要
我们展示了詹姆斯·韦布空间望远镜近红外相机对位于TW天琴座星协的两个M矮星系统TWA 10和TWA 25的观测结果。在F200W和F444W滤镜下，两个系统都探测到了碎片盘。TWA 25的盘面之前已被成像，而此次观测发现了TWA 10的碎片盘并首次成像。除了在这些系统中搜寻行星，我们还对每个碎片盘进行了分析，首次对TWA 10碎片盘进行了特征描述。发现TWA 10碎片盘非常大，半径约191天文单位，显著大于其他已知M矮星碎片盘。TWA 25盘面有尖锐的内尘埃表面密度幂律和2微米处的中等亮度不对称，暗示可能受到内行星的塑造和潜在增强的碰撞活动。最后，在TWA 10系统中发现一个潜在伴星候选体，TWA 25系统中有两个，不过测量的F200W - F444W颜色表明这些候选体可能是背景天体。两个系统在其光谱能量分布中均未测得红外过剩，辐射传输模型表明，由于光度分数低，这些盘面（可能还有更多M矮星盘面）可能在之前的盘面探测调查中被遗漏。
英文摘要
We present JWST NIRCam observations of two M-dwarf systems located in the TW Hydra association, TWA 10 and TWA 25. Both systems harbor detected debris disks in the F200W and F444W filters. Whereas the TWA 25 disk has been previously imaged, these observations represent the discovery and first images of the TWA 10 disk. In addition to planet searches within these systems, we also conduct an analysis of each debris disk, where the TWA 10 debris disk is characterized for the first time. We find that the TWA 10 debris disk is very large, with a radius of $\sim$191 au, significantly greater than other known M-dwarf debris disks. The TWA 25 disk hosts a sharp inner dust surface density power-law and a moderate brightness asymmetry present at 2 $μ$m, suggesting potential sculpting from inner planets and potentially enhanced collisional activity. Finally, we find one potential companion candidate within the TWA 10 system and two within the TWA 25 system, although the measured F200W-F444W color suggests that these candidates are likely background objects. Both systems do not have measured IR-excesses in their SEDs, where radiative-transfer modeling suggests that these disks (and potentially more M-dwarf disks) were likely missed by previous disk detection surveys due to having low luminosity fractions.
Comments23 pages, 12 figures, 6 tables, accepted for publication in ApJ
