Journal of Astronomy and Space Sciences

The Korean Space Science Society (한국우주과학회)
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POSSIBLE DERIVATIONS OF ORTHO- AND PARA-$H_2$ RATIOS IN THE ATMOSPHERES OF THE GIANT PLANETS USING THE $2\mu m$ SPECTRAL STRUCTURES OF $(H_2)_2$

  • Kim, Sang-Joon (Department of Astronomy and Space Science Kyung Hee University) ;
  • Lee, Yong-Sik (Department of Chemistry Kyung Hee University)
  • Published : 2001.11.01
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Abstract

We have presented an ab initio model of the $2{mu}m$ spectral features of $(H_2)_2$ based on the far-infrared models of McKellar & Schaefer (1991). We have shown that the intensity variations of the $2{mu}m;(H_2)_2$ features depend on the ortho/para ratios of $H_2$ We have discussed the applicability of the variations to the atmospheres of the giant planets for the derivations of the ortho/para ratios. The signal to noise ratios of currently available spectra of the giant planets are not sufficient enough to derive accurate ortho/para ratios of these planets. Observations with longer exposure times and larger telescope apertures are required to obtain better spectra for the derivations of the ortho/para ratios of $H_2$ in the atmospheres of the giant planets.

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