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Color-albedo variation on Mercury: Observations and implications for composition and maturation state
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Astronomy and Space Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Astronomy and Space Physics.
2005 (English)In: Asia-Oceania Geophysical Sciences 2nd Annual Meeting, 2005Conference paper, Published paper (Other academic)
Abstract [en]

ethods to determine the abundances of iron and titanium from multispectral data

of the Moon have been derived through the use of 415/750 nm and 950/750 nm color-

-albedo relationships and laboratory samples [3,4,5]. These methods were applied

to telescopic observations of Mercury [1,2,9] to show that the elemental abundanc

es of titanium and iron are substantially lower for the integral Mercury than for

the Moon, consistent with the observed color-albedo relationships determined fro

m Mariner 10 image data [6,7]. As the surface maturation processes may be assumed

to operate similarly on the two bodies, a relative comparison is possible.

This paper investigates this topic further by presenting an analysis of high-reso

lution data of Mercury obtained with the 1-m Swedish Solar Telescope on La Palma

in April 2003, at longitudes 180--270$^\circ$ W on the hemisphere unimaged by Mar

iner 10. Images were obtained at six evenly spaced wavelengths (see [8]) and phot

ometrically normalized to study the 750 nm bidirectional reflectance versus 450/7

50 nm and 940/750 nm ratios. This enables a determination of the two-dimensional

distribution of these properties for Mercury, a comparison with the Moon and an i

mproved interpretation of the mercurian surface in terms of the general model of

optical maturation of atmosphereless silicate bodies [6].

Place, publisher, year, edition, pages
2005.
Identifiers
URN: urn:nbn:se:uu:diva-71439OAI: oai:DiVA.org:uu-71439DiVA: diva2:99350
Available from: 2005-05-09 Created: 2005-05-09 Last updated: 2009-08-25

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