Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· References in the article
· Citations to the Article (42) (Citation History)
· Refereed Citations to the Article
· Reads History
·
· Translate This Page
Title:
Ferric iron in primitive asteroids - A 0.43-micron absorption feature
Authors:
Vilas, F.; Hatch, E. C.; Larson, S. M.; Sawyer, S. R.; Gaffey, M. J.
Affiliation:
AA(NASA, Johnson Space Center, Houston, TX), AB(Louisiana Centenary College, Shreveport), AC(Arizona Univ., Tucson, AZ), AD(Texas Univ., Austin), AE(Rensselaer Polytechnic Inst., Troy, NY)
Publication:
Icarus (ISSN 0019-1035), vol. 102, no. 2, p. 225-231. (Icarus Homepage)
Publication Date:
04/1993
Category:
Lunar and Planetary Exploration; Asteroids
Origin:
STI
NASA/STI Keywords:
ABSORPTION SPECTRA, ASTEROIDS, FORBIDDEN TRANSITIONS, IRON COMPOUNDS, PLANETARY COMPOSITION, PORPHYRINS, SILICATES, SOLAR SYSTEM EVOLUTION, WATER
Keywords:
ASTEROIDS, IRON, ABUNDANCE, COMPOSITION, ABSORPTION, VISIBLE LIGHT, WAVELENGTH, ULTRAVIOLET, SPECTRA, CLASSIFICATION, MINERALS, ORIGIN, FORMATION, AQUEOUS ALTERATION, PHYLLOSILICATES, DATA REDUCTION, CATALOG, REFLECTANCE, ANALYSIS
DOI:
10.1006/icar.1993.1045
Bibliographic Code:
1993Icar..102..225V

Abstract

A search of reflectance spectra of C- P-, D- and S-class asteroids to hunt for the Soret band near 0.4 micron that is indicative of porphyrins yielded an identification of an 0.43 micron absorption feature in 11 primitive asteroids of the C, P, and G classes and in one S-class asteroid. It is proposed that the feature is an Fe(3+) spin-forbidden transition in aqueously altered material, possibly located near 0.43 micron due to an enhancement effect similar to the mechanism operating in jarosite. The significance of the feature for the aqueous alteration history of these asteroids is addressed.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
  New!

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints