Atmospheric modelling for the removal of telluric features from infrared planetary spectra

作者：Cotton Daniel V^*; Bailey Jeremy; Kedziora Chudczer Lucyna

来源：Monthly Notices of the Royal Astronomical Society, 2014, 439(1): 387-399.

DOI：10.1093/mnras/stt2465

• radiative transfer
• techniques: spectroscopic
• planets and satellites: atmospheres
• infrared: planetary systems

The effects of telluric absorption on infrared spectra present a problem for the observer. Strong molecular absorptions from species whose concentrations vary with time can be particularly challenging to remove precisely. Yet removing these effects is key to accurately determining the composition of many astronomical objects - planetary atmospheres in particular. Here, we present a method for removing telluric effects based on a modelling approach. The method relies only on observations usually made by the planetary astronomer, and so is directly comparable with current techniques. We use the modelling approach to process observations made of Jupiter, and Saturn's moon Titan and compare the results with those of the standard telluric division technique, finding the modelling approach to have distinct advantages even in conditions regarded as ideal for telluric division.

• 出版日期2014-3