Extragalactic Astronomy with IR Arrays

利用红外阵列进行河外天文学

• 批准号: 9121784
• 负责人: Barbara Jones
• 金额: $ 20.5万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-05-01 至 1994-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9121784&HistoricalAwards=false
• 关键词: Extragalactic; Astronomy; IR; Arrays

The "Golden-Gopher", a mid-infrared, 2-dimensional imaging instrument was completed in 1989. The focal plane uses a 20X64 element As:Si array manufactured by Aerojet Electronic Systems Division with a plate scale of 0.83 arcsec/pixel. The Golden- Gopher currently achieves SNR = 1 at a flux density of 3 mJy/pixel in 30 minutes of on-source integration at 8.5 micrometer with a 1 micrometer bandwidth. The optical design includes a spectroscopic option at R=100 by rotating a plane mirror which has a grating back-to-back. Problems with the rotation bearing mechanism have prevented observations in the spectroscopic mode. In the coming year the Golden-Gopher will be modified to enable routine spectroscopic observations, e.g. long slit spectra of the silicate feature of galactic nuclei and the 8.7 and 11.3 micrometer "PAH" bands as well as the ıAr III!, ıS IV) and ıNe II! lines. Imaging spectroscopic observations are to be made of a wide range of galaxies, including systems from the IRAS bright galaxy sample. These data will give information on the morphology of the nuclear region and the physical extent of the emitting dust and ionized gas. Such measurements will allow new limits to be placed on the proportion of flux due to unresolved active nuclei as opposed to regions of star formation.

“金地鼠”是一种中红外二维成像仪，于1989年建成。焦平面使用20x64元素作为：由AeroJet电子系统事业部制造的硅阵列，板比例为0.83角秒/像素。Golden-Gopher目前在8.5微米、带宽为1微米的情况下，在30分钟内实现了通量密度为3mJy/像素的SNR=1。光学设计包括通过旋转具有背靠背光栅的平面镜在R=100的情况下的光谱选项。旋转轴承机构的问题阻碍了光谱模式下的观测。在来年，金地鼠将进行改装，以便进行常规的光谱观测，例如，银河系核心硅酸盐特征的长缝光谱，8.7微米和11.3微米的“PAH”带以及ıAr III！，ıS IV)和ıNe II！台词。成像光谱观测将对广泛的星系进行，包括来自IRAS明亮星系样本的系统。这些数据将提供有关核区形态和释放尘埃和电离气体的物理范围的信息。这种测量将允许对未分解的活动核造成的流量比例施加新的限制，而不是恒星形成区域。