论文标题
NGC 5253中的离子气体超级nebula：高空间和光谱分辨率观测，与JVLA和Texes进行
Ionized Gas in the NGC 5253 Supernebula:High Spatial and Spectral Resolution Observations with the JVLA and TEXES
论文作者
论文摘要
最年轻，最接近，最紧凑的嵌入式巨大恒星簇已知，在附近的矮人Galaxy NGC 5253中激发了Supernebula。这是研究最庞大的恒星群的出生和演变的关键目标和测试案例。我们介绍了具有高空间和光谱分辨率的该来源中电离气体的观察。数据包括用JVLA在15、22和33 GHz制成的〜0.15''分辨率的连续图像，以及[SIV] 10.5 Microt-Minter-Fine-findstructure发射线的完整数据立方体，具有〜4.5 km/s/s的速度分辨率和0.3'''的光束，并在Texes上获得了Gemini North的Texes。我们发现1）离子气体从臂或喷气机的簇中延伸出来，2）离子气体构成了两个组件，两种成分都在空间和速度上偏移。我们讨论可能创建观察到的速度场的机制。可能性包括大规模喷气机或落在主要来源上的子集群。
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.
