FIRST ULTRAVIOLET REFLECTANCE SPECTRA OF PLUTO AND CHARON BY THE HUBBLE SPACE TELESCOPE COSMIC ORIGINS SPECTROGRAPH: DETECTION OF ABSORPTION FEATURES AND EVIDENCE FOR TEMPORAL CHANGE

被引：12
|
作者：
Stern, S. A. [1 ]
Cunningham, N. J. [2 ]
Hain, M. J. [2 ]
Spencer, J. R. [1 ]
Shinn, A. [1 ]
机构：
[1] SW Res Inst, Boulder, CO 80302 USA
[2] Nebraska Wesleyan Univ, Lincoln, NE 68504 USA
来源：
ASTRONOMICAL JOURNAL | 2012年 / 143卷 / 01期
关键词：
planets and satellites: surfaces; TRITON; ICES;
D O I：
10.1088/0004-6256/143/1/22
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We have observed the mid-UV spectra of both Pluto and its large satellite, Charon, at two rotational epochs using the Hubble Space Telescope (HST) Cosmic Origins Spectrograph (COS) in 2010. These are the first HST/COS measurements of Pluto and Charon. Here we describe the observations and our reduction of them, and present the albedo spectra, average mid-UV albedos, and albedo slopes we derive from these data. These data reveal evidence for a strong absorption feature in the mid-UV spectrum of Pluto; evidence for temporal change in Pluto's spectrum since the 1990s is reported, and indirect evidence for a near-UV spectral absorption on Charon is also reported.
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页数：4
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