Spectroscopic Observations of Mercury's Surface Reflectance During MESSENGER's First Mercury Flyby-Reference-Cited by-同舟云学术

Spectroscopic Observations of Mercury's Surface Reflectance During MESSENGER's First Mercury Flyby

Published:2008-07-04 Issue:5885 Volume:321 Page:62-65
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

McClintock William E.¹²³⁴⁵,Izenberg Noam R.¹²³⁴⁵,Holsclaw Gregory M.¹²³⁴⁵,Blewett David T.¹²³⁴⁵,Domingue Deborah L.¹²³⁴⁵,Head James W.¹²³⁴⁵,Helbert Jörn¹²³⁴⁵,McCoy Timothy J.¹²³⁴⁵,Murchie Scott L.¹²³⁴⁵,Robinson Mark S.¹²³⁴⁵,Solomon Sean C.¹²³⁴⁵,Sprague Ann L.¹²³⁴⁵,Vilas Faith¹²³⁴⁵

Affiliation:

1. Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, USA.

2. Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA.

3. Department of Geological Sciences, Brown University, Providence, RI 02912, USA.

4. Institute of Planetary Research, Deutsches Zentrum für Luftund Raumfahrt, Berlin 12489, Germany.

5. National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA.

Abstract

During MESSENGER's first flyby of Mercury, the Mercury Atmospheric and Surface Composition Spectrometer made simultaneous mid-ultraviolet to near-infrared (wavelengths of 200 to 1300 nanometers) reflectance observations of the surface. An ultraviolet absorption (<280 nanometers) suggests that the ferrous oxide (Fe 2+ ) content of silicates in average surface material is low (less than 2 to 3 weight percent). This result is supported by the lack of a detectable 1-micrometer Fe 2+ absorption band in high-spatial-resolution spectra of mature surface materials as well as immature crater ejecta, which suggests that the ferrous iron content may be low both on the surface and at depth. Differences in absorption features and slope among the spectra are evidence for variations in composition and regolith maturation of Mercury's surface.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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