The Spectrum of Comet Hale-Bopp (C/1995 O1) Observed with the Infrared Space Observatory at 2.9 Astronomical Units from the Sun
The Spectrum of Comet Hale-Bopp (C/1995 O1) Observed with the Infrared Space Observatory at 2.9 Astronomical Units from the Sun
复制标题
红外空间天文台在距太阳 2.9 天文单位处观测到的海尔-波普彗星 (C/1995 O1) 的光谱
作者：
J. Crovisier;K. Leech;D. Bockelée;T. Brooke;M. Hanner;B. Altieri;H. Keller;E. Lellouch;Comet Hale
海尔-波普彗星(C/1995 O1)是由美国红外线空间天文台在波长2.4-195微米范围内观测到的，当时该彗星距离太阳约2.9个天文单位。从原子核升华的主要挥发物是水、一氧化碳和二氧化碳，其比例为10：6：2。这些物种也是密集星际分子云中冰的主要观察成分；这一观察加强了彗星和星际物质之间的联系。在7至45微米区域观察到的几个广泛的发射特征表明存在硅酸盐，特别是富镁结晶橄榄石。这些特征类似于在织女星类型恒星的尘埃层中观察到的特征。
Comet Hale-Bopp (C/1995 O1) was observed at wavelengths from 2.4 to 195 micrometers with the Infrared Space Observatory when the comet was about 2.9 astronomical units (AU) from the sun. The main observed volatiles that sublimated from the nucleus ices were water, carbon monoxide, and carbon dioxide in a ratio (by number) of 10:6:2. These species are also the main observed constituents of ices in dense interstellar molecular clouds; this observation strengthens the links between cometary and interstellar material. Several broad emission features observed in the 7- to 45-micrometer region suggest the presence of silicates, particularly magnesium-rich crystalline olivine. These features are similar to those observed in the dust envelopes of Vega-type stars.