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arXiv 1006.4606astro-ph.CO
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星系演化的红外透视

The Evolution of Galaxies: an Infrared Perspective

Cristina C. Popescu, Richard J. Tuffs

摘要:

了解星系的红外辐射对于观测和理论研究星系在星系际介质中的凝聚以及在宇宙时间内气体转化为恒星至关重要。从观测的角度来看,星系内发射的所有光子中约有一半被尘埃颗粒局部吸收,因此有必要对星系的全色发射进行自洽分析,以量化恒星形成和活动星系核活动作为时代和环境的函数。从理论的角度来看,涉及尘埃的物理过程预计将在调节星系中重子的积累及其凝结成恒星的过程中发挥重要作用,其尺度从Mpc到sub-pc不等。所有这些都需要对尘埃、气体和辐射之间的相互作用进行定量分析。在这里,我们审查的进展,其中一些过程的建模。

英文摘要:

Understanding the infrared emission of galaxies is critical to observational and theoretical investigations of the condensation of galaxies out of the intergalactic medium and the conversion of gas into stars over cosmic time. From an observational perspective, about half of all photons emitted within galaxies are locally absorbed by dust grains, necessitating a self-consistent analysis of the panchromatic emission of galaxies to quantify star-formation and AGN activity as a function of epoch and environment. From a theoretical perspective, physical processes involving dust are expected to play a major role in regulating the accumulation of baryons in galaxies and their condensation into stars on scales ranging from Mpc down to sub-pc. All this requires a quantitative analysis of the interaction between dust, gas and radiation. Here we review progress in the modelling of some of these processes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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