NGC 5253超星云中的电离气体：用JVLA和TEXES进行的高空间和光谱分辨率观测
Ionized Gas in the NGC 5253 Supernebula:High Spatial and Spectral Resolution Observations with the JVLA and TEXES
摘要：
已知最年轻，最近和最紧凑的嵌入式大质量星团激发了附近矮星系NGC 5253中的超星云。它是研究最大质量星团的诞生和演化的关键目标和测试案例。我们目前的观测电离气体在这个源具有高的空间和光谱分辨率。这些数据包括JVLA在15、22和33 GHz下制作的~ 0.15“分辨率的自由-自由发射的连续图像，以及[SIV]10.5微米精细结构发射线的完整数据立方体，速度分辨率为~4.5 km/s，光束为0.3”，由Gemini North上的TEXES获得。我们发现：（1）电离气体以臂或喷流的形式从团簇中向外延伸;（2）电离气体由两个分量组成，这两个分量在空间上和速度上都有偏移。我们讨论的机制，可能已经创建了观察到的速度场，可能性包括大规模的射流或子集群落在主源。
英文摘要：
The youngest, closest and most compact embedded massive star cluster known excites the supernebula in the nearby dwarf galaxy NGC 5253. It is a crucial target and test case for studying the birth and evolution of the most massive star clusters. We present observations of the ionized gas in this source with high spatial and spectral resolution. The data includes continuum images of free-free emission with ~0.15'' resolution made with the JVLA at 15, 22 and 33 GHz, and a full data cube of the [SIV]10.5 micron fine-structure emission line with ~4.5 km/s velocity resolution and 0.3'' beam, obtained with TEXES on Gemini North. We find that 1) the ionized gas extends out from the cluster in arms or jets, and 2) the ionized gas comprises two components offset both spatially and in velocity. We discuss mechanisms that may have created the observed velocity field; possibilities include large-scale jets or a subcluster falling onto the main source.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
