Component-resolved Near-infrared Spectra of the (22) Kalliope System

Abstract

We observed (22) Kalliope and its companion Linus with the integral-field spectrograph OSIRIS, which is coupled to the adaptive optics system at the W.M. Keck II telescope on March 25 2008. We present, for the first time, component-resolved spectra acquired simultaneously in each of the Zbb (1-1.18 um), Jbb (1.18-1.42 um), Hbb (1.47-1.80 um), and Kbb (1.97-2.38 um) bands. The spectra of the two bodies are remarkably similar and imply that both bodies were formed at the same time from the same material; such as via incomplete re-accretion after a major impact on the precursor body.

20 pages, 5 figures, 1 table. Accepted for publication in Icarus

References in corpus (3)

• A low density of 0.8 g/cc for the Trojan binary asteroid 617 Patroclus
• New determination of the size and bulk density of the binary asteroid 22 Kalliope from observations of mutual eclipses
• Main Belt Binary Asteroidal Systems With Circular Mutual Orbits

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• Characterizing and Improving the Data Reduction Pipeline for the Keck OSIRIS Integral Field Spectrograph
• A spectral comparison of (379) Huenna and its satellite
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