Composition and radiative properties of grains in molecular clouds and accretion disks
- J. Pollack, D. Hollenbach, S. Beckwith, D. Simonelli, T. Roush, W. Fong
- Physics, Geology
- 1 February 1994
We define a model of the compositon and abundances of grains and gases in molecular cloud cores and accretion disks around young stars by employing a wide range of astronomical data and theory, the…
Reflectance spectroscopy - Quantitative analysis techniques for remote sensing applications. [in planetary surface geology]
Several methods for the analysis of remotely sensed reflectance data are compared, including empirical methods and scattering theories, both of which are important for solving remote sensing…
Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) on Mars Reconnaissance Orbiter (MRO)
- S. Murchie, R. Arvidson, M. Wolff
- Environmental Science, Physics
- 1 May 2007
[1] The Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) is a hyperspectral imager on the Mars Reconnaissance Orbiter (MRO) spacecraft. CRISM consists of three subassemblies, a gimbaled…
Mars Global Surveyor Thermal Emission Spectrometer experiment: Investigation description and surface science results
- P. Christensen, J. Bandfield, M. Greenfield
- Geology, Environmental Science
- 25 October 2001
The Thermal Emission Spectrometer (TES) investigation on Mars Global Surveyor (MGS) is aimed at determining (1) the composition of surface minerals, rocks, and ices; (2) the temperature and dynamics…
Orbital Identification of Carbonate-Bearing Rocks on Mars
- B. Ehlmann, J. Mustard, J. Wray
- GeologyScience
- 19 December 2008
The presence of carbonate as well as accompanying clays suggests that waters were neutral to alkaline at the time of its formation and that acidic weathering, proposed to be characteristic of Hesperian Mars, did not destroy these carbonates and thus did not dominate all aqueous environments.
Surface Ices and the Atmospheric Composition of Pluto
- T. Owen, T. Roush, M. Bartholomew
- Physics, Environmental ScienceScience
- 6 August 1993
Observations of the 1.4- to 2.4-micrometer spectrum of Pluto reveal absorptions of carbon monoxide and nitrogen ices and confirm the presence of solid methane. Frozen nitrogen is more abundant than…
Ices on the Surface of Triton
- D. Cruikshank, T. Roush, M. Bartholomew
- ChemistryScience
- 6 August 1993
The near-infrared spectrum of Triton reveals ices of nitrogen, methane, carbon monoxide, and carbon dioxide, of which nitrogen is the dominant component, which challenges existing models of methane and nitrogen photochemistry on Tritons.
The Composition of Centaur 5145 Pholus
- D. Cruikshank, T. Roush, C. Ore
- Physics
- 1 October 1998
Abstract We present a new spectrum of the Centaur object 5145 Pholus between 1.15 and 2.4 μm. We model this, and the previously published (0.4- to 1.0-μm) spectrum, using Hapke scattering theory.…
Hydrated silicate minerals on Mars observed by the Mars Reconnaissance Orbiter CRISM instrument
- J. Mustard, S. Murchie, M. Wolff
- GeologyNature
- 1 July 2008
The diversity of phyllosilicate mineralogy is expanded with the identification of kaolinite, chlorite and illite or muscovite, and a new class of hydrated silicate (hydrated silica).
Near-Infrared Spectroscopy of Charon: Possible Evidence for Cryovolcanism on Kuiper Belt Objects
- J. Cook, S. Desch, T. Roush, C. Trujillo, T. Geballe
- Geology
- 1 September 2006
We present the first reported adaptive optics spectra of Charon in the H and K bands, which examine the anti-Pluto and sub-Pluto hemispheres. The ice temperature is estimated at 40-50 K, based on the…
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