Astronomical imaging spectroscopy at far-infrared wavelengths

远红外波长的天文成像光谱

• 批准号: RGPIN-2016-06551
• 负责人: Naylor, David
• 金额: $ 7.07万
• 依托单位: University of Lethbridge
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=633434
• 关键词: Astronomical; imaging; spectroscopy; far; infrared

Approximately half of the radiant energy emitted by the universe falls in the far-infrared (FIR) spectral range (30–1000 µm) for two reasons: the first is that sources in the distant universe, galaxies in the local universe, or protostars in our own galaxy are often shrouded in dust and gas. The dust efficiently scatters and absorbs shorter wavelength radiation, which is subsequently re-radiated at longer wavelengths, both as continuum (dust) and line (ions, atoms, molecules) emission. The second reason is that distant galaxies do not decrease in IR brightness with increasing distance, because their emission is redshifted into the IR.

宇宙发出的辐射能量的大约一半落在远红外（FIR）光谱范围（30–1000 µm）中，原因有两个：第一个是遥远的宇宙中的来源，当地宇宙中的星系或我们自己的银河系中的代理恒星通常笼罩在灰尘和气体中。灰尘有效地散射并吸收较短的波长辐射，随后在更长的波长下重新辐射，无论是连续的（灰尘）和线（离子，原子，分子）发射。第二个原因是，远处星系不会随着距离的增加而在IR亮度中降低，因为它们的发射被红移到IR中。