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1996•International Astronomical Union ColloquiumOpen access

Isotopic Anomalies in Interplanetary Dust Particles

S. Messenger, Robert M. Walker

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Abstract

Abstract Approximately 1/3 of interplanetary dust particles (IDPs) and some primitive meteorites have large excesses in D and/or 15N compared to terrestrial materials. Constraints on the nature and origin of the carriers of these isotopic anomalies are reviewed. Special attention is given to a recently discovered extremely D-rich cluster IDP.

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Abstract Approximately 1/3 of interplanetary dust particles (IDPs) and some primitive meteorites have large excesses in D and/or 15N compared to terrestrial materials. Constraints on the nature and origin of the carriers of these isotopic anomalies are reviewed. Special attention is given to a recently discovered extremely D-rich cluster IDP.

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Available abstract

Abstract Approximately 1/3 of interplanetary dust particles (IDPs) and some primitive meteorites have large excesses in D and/or 15N compared to terrestrial materials. Constraints on the nature and origin of the carriers of these isotopic anomalies are reviewed. Special attention is given to a recently discovered extremely D-rich cluster IDP.

Key concepts: Interplanetary dust cloud, Meteorite, Astrobiology, Interplanetary spaceflight, Interplanetary medium, Geology, Cosmic dust, Physics

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