A bolometric Bond albedo map of Iapetus: Observations from Cassini VIMS and ISS and Voyager ISS

被引：13

作者：

Blackburn, David G. ^{[1
]}

Buratti, Bonnie J. ^{[2
]}

Ulrich, Richard ^{[3
]}

机构：

[1] Univ Arkansas, Arkansas Ctr Space & Planetary Sci, Fayetteville, AR 72701 USA

[2] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[3] Univ Arkansas, Dept Chem Engn, Fayetteville, AR 72701 USA

来源：

ICARUS | 2011年 / 212卷 / 01期

基金：

美国国家航空航天局;

关键词：

Iapetus; Photometry; Satellites; Surfaces; INFRARED MAPPING SPECTROMETER; DARK SIDE; IMAGING SCIENCE; PHOTOMETRY; LAPETUS; ORIGIN; SATURN; SATELLITES; DICHOTOMY; SURFACE;

D O I：

10.1016/j.icarus.2010.12.022

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We utilized Cassini VIMS, Cassini ISS, and Voyager ISS observations of Iapetus to produce the first bolometric Bond albedo map of Iapetus. The average albedo values for the leading and trailing hemispheres are 0.06 +/- 0.01 and 0.25 +/- 0.03, respectively. However, the bright material in high-resolution ISS images has a value of 0.38 +/- 0.04, highlighting the importance of resolution in determining accurate albedo values for Iapetus due to the speckling of localized regions of dark material into the trailing hemisphere. The practical application of this map is determining more accurate surface temperatures in thermal models; these albedo values translate into first order blackbody temperatures of 125.5 K and 118.4 K for the trailing and leading hemispheres at the semi-major axis. (C) 2010 Elsevier Inc. All rights reserved.

引用

页码：329 / 338

页数：10

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