Infrared and Submillimetre Observing Conditions on the Antarctic Plateau

Publications of the Astronomical Society of Australia

Marton G. Hidas¹ 

[1] Michael G. Burton

关键词: site testing;    atmospheric effects;    infrared: general;   

DOI  :  10.1071/AS00033

学科分类：天文学(综合)

来源: CSIRO

【 摘 要 】

The Antarctic Plateau provides the best terrestrial sites for infrared (IR) and submillimetre (sub-mm) astronomy. In this paper we examine the relative importance of temperature, aerosol content and precipitable water vapour to determine which parameters have the greatest influence on atmospheric transmission and sky brightness. We use the atmospheric modelling program MODTRAN to model the observed sky spectrum at the South Pole from the near-IR to the sub-mm. We find that temperature and aerosol content determine the quality of near-IR observing conditions, aerosol content is the determining factor in the mid-IR up to 20 μm, while at longer wavelengths, including the sub-mm, it is the water vapour content that matters. Finding a location where aerosol levels are minimised is a key constraint in determining the optimum site on the Antarctic Plateau for an IR observatory.

【 授权许可】

Unknown