Thermal Emission Spectroscopy of M-type Asteroids: How Many are Metallic?

Details Thermal Emission Spectroscopy of M-type Asteroids: How Many are Metallic? Thermal Emission Spectroscopy of M-type Asteroids: How Many are Metallic?

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf.1438e&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.1438

Physics

Scientific paper

The M-type asteroid taxon was originally inferred to represent metallic objects, presumably the cores of differentiated asteroids. Evidence has mounted that at least some fraction of the members of this class has silicate rather than metallic surfaces, reopening the question of their natures. We have measured thermal emission spectra of 27 M-type asteroids in order to constrain thermal properties as well as silicate mineralogy. We correlate the results from this work with published radar albedos, and reflectance spectra from the visible and near-infrared (0.4 to 4.0 μm), and estimated densities to identify those objects most likely to have a high metal content.

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