Multiwavelength studies of galaxy evolution

星系演化的多波长研究

• 批准号: 341847-2010
• 负责人: Webb, Tracy
• 金额: $ 2.33万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=549505
• 关键词: Multiwavelength; studies; galaxy; evolution

One of the most profound questions in science is: how did the rich and complex structure in the universe form and evolve from the exquisitely simple conditions following the Big Bang? Using state of the art facilities astronomers have pushed observations deep into the early universe in an attempt to clarify this process by tracing the evolution of galaxies with time. Success requires observations at a variety of wavelengths of light, from the ultraviolet to the radio, since different wavelengths are sensitive to different physical processes. The infrared and submillimeter wavelength regimes are particularly important as they sample the thermal emission from dust grains heated by the energy released from forming stars and accretion onto supermassive black holes; both of these processes are intimately tied to galaxy evolution and are often enshrouded in dust cocoons.

科学中最深刻的问题之一是：宇宙中丰富而复杂的结构是如何从大爆炸之后极其简单的条件形成和演化的？ 天文学家利用最先进的设施将观测深入到早期宇宙，试图通过追踪星系随时间的演化来阐明这一过程。成功需要对从紫外线到无线电波的各种波长的光进行观察，因为不同的波长对不同的物理过程敏感。 红外和亚毫米波长范围尤其重要，因为它们对尘埃颗粒的热发射进行采样，这些尘埃颗粒被形成恒星和吸积到超大质量黑洞所释放的能量加热。这两个过程都与星系演化密切相关，并且通常被包裹在尘埃茧中。