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arXiv 1210.3754astro-ph.COastro-ph.GA
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用FISICA探测NGC 1569的超星团环境

Probing the Super Star Cluster Environment of NGC 1569 Using FISICA

D. M. Clark, S. S. Eikenberry, S. N. Raines, N. Gruel, R. Elston, R. Guzman, G. Boreman, P. E. Glenn

摘要:

我们目前的近红外JH光谱的矮星暴星系NGC 1569的中心区域使用佛罗里达州的红外宇宙学和天体物理学图像切片(FISICA)。近红外的灰尘穿透特性和可用的光谱特征,结合积分场单元(IFU)拍摄场光谱的能力,使FISICA成为这项工作的理想工具。我们利用[He I](1.083μm)和Paβ(1.282 μm)的显著谱线探测了NGC 1569超星团(SSC)周围的致密恒星形成区,并描述了恒星形成的一般环境。我们发现[He I]与SSC北部和西部的CO云重合,这为这里的嵌入式星团提供了第一个确凿的证据。

英文摘要:

We present near-IR JH spectra of the central regions of the dwarf starburst galaxy NGC 1569 using the Florida Image Slicer for Infrared Cosmology and Astrophysics (FISICA). The dust-penetrating properties and available spectral features of the near-IR, combined with the integral field unit (IFU) capability to take spectra of a field, make FISICA an ideal tool for this work. We use the prominent [He I] (1.083μm) and Paβ(1.282 μm) lines to probe the dense star forming regions as well as characterize the general star forming environment around the super star clusters (SSCs) in NGC 1569. We find [He I] coincident with CO clouds to the north and west of the SSCs, which provides the first, conclusive evidence for embedded star clusters here.

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