کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5428105 | 1508661 | 2015 | 11 صفحه PDF | دانلود رایگان |

This is a sequel to an earlier paper of the author titled 'Rosseland mean opacities of air and H-chondrite vapor in meteor entry problems'. In the earlier paper, Rosseland opacity values were calculated for the ablation product and the air flow in the shock layer over the H-chondrite meteoroids, over the pressure and temperature ranges encountered in the entry flights of those meteoroids. In the present work, a similar calculation is made for the meteoroids of cometary nature. The meteoroid is assumed to have the composition of the Orgueil meteoroid, a carbonaceous chondrite meteoroid for which chemical composition is best known. The 15 elements known to comprise the meteoroid are consolidated into seven elements by counting eight minor constituents as parts of the seven major constituents. The strengths of the unknown bound-free continua are estimated by assuming the associated Gaunt factor to be unity. The present results show that the Rosseland mean free paths for the vapor of the cometary meteoroids are an order of magnitude larger than those of the asteroidal meteoroids at low temperatures.
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 154, March 2015, Pages 44-54