窥视巨型分子云G148.24+00.41的心脏：新孵化星团FSR 655的深度近红外视图
Peering into the Heart of the Giant Molecular Cloud G148.24+00.41: A Deep Near-infrared View of the Newly Hatched Cluster FSR 655
AI总结：
本文利用TANSPEC仪器对巨型分子云G148.24+00.41中心的嵌入星团FSR 655进行深度近红外研究，测得其年龄约0.5 Myr、质量约180 $M_\odot$，并发现其通过丝状网络连接气体储库，具有演化为更丰富星团的潜力。
摘要：
我们利用安装在3.6 m Devasthal Optical Telescope上的TANSPEC仪器，对位于质量约10$^5$ $M_\odot$的巨型分子云G148.24+00.41中心枢纽内的嵌入星团进行了详细的近红外研究。该枢纽位于云的几何中心附近，代表了其最巨大的团块。我们研究了枢纽中心2 pc $\times$ 2 pc的区域，在$J$、$H$和$K_s$波段的5$\sigma$极限星等分别为20.5、20.1和18.6 mag。利用$K_s$波段光度函数并与合成星团进行比较，我们得出该星团的年龄约为0.5 Myr，这一结果与附近嵌入星团的视觉消光与年龄关系高度吻合。我们发现该星团当前质量约为180 $M_\odot$，目前正以约330 $M_\odot$ Myr$^{-1}$的速率形成恒星，效率约为20%。该星团通过丝状网络与延伸的气体储库相连；因此，我们推测该星团在几Myr内有潜力发展成为一个更丰富的星团。
英文摘要：
We present a detailed near-infrared study of an embedded cluster located in the hub of the giant molecular cloud G148.24+00.41 of mass $\sim$10$^5$ $M_\odot$, with the TANSPEC instrument mounted on the 3.6 m Devasthal Optical Telescope. The hub is located near the geometric center of the cloud and represents its most massive clump. We studied the central 2 pc $\times$ 2 pc area of the hub with 5$σ$ limiting magnitudes of 20.5, 20.1, and 18.6 mag in the $J$, $H$, and $K_s$ bands, respectively. Using the $K_s$-band luminosity function and comparing it with the synthetic clusters, we obtained the age of the cluster as $\sim$0.5 Myr, which was found to corroborate well with the visual extinction versus the age of nearby embedded clusters. We find that the present mass of the cluster is around $\sim$180 $M_\odot$, and the cluster is currently forming stars at a rate of $\sim$330 $M_\odot$ $\rm{Myr}^{-1}$, with an efficiency of $\sim$20%. The cluster is connected to an extended gas reservoir through a filamentary network; thus, we hypothesize that the cluster has the potential to become a richer cluster in a few Myr of time.
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