THE TEMPERATURE-DEPENDENT SPECTRA OF ALPHA-NITROGEN AND BETA-NITROGEN ICE WITH APPLICATION TO TRITON

被引：55

作者：

GRUNDY, WM ^{[1
]}

SCHMITT, B ^{[1
]}

QUIRICO, E ^{[1
]}

机构：

[1] LAB GLACIOL & GEOPHYS ENVIRONM,ST MARTIN DHERES,FRANCE

来源：

ICARUS | 1993年 / 105卷 / 01期

关键词：

D O I：

10.1006/icar.1993.1122

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present measurements of the temperature dependence of the near-infrared spectra of α and β nitrogen ice, measured in transmission in 1-cm-thick samples. Our 0.9-cm-1 resolution spectra of β ice reveal that the 4650 cm-1 (2.15 μm) hand is a complex, temperature-dependent absorption, composed of at least two components. For lower temperature α ice, our spectra show a complex, temperature-dependent pattern involving several weak features in addition to the strong, narrow band we attribute to a double phonon transition. We apply our results in modeling telescopic spectra of Triton and conclude that the spectral data are consistent with a surface composed predominantly of β nitrogen ice at temperatures between 35.6 and 41 K, in the form of grains of order 1 cm or larger in size or in the form of a surface glaze with a depth of at least 6 cm. © 1993 by Academic Press, Inc.

引用

页码：254 / 258

页数：5