NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Supernova olivine from cometary dustAn interplanetary dust particle contains a submicrometer crystalline silicate aggregate of probable supernova origin. The grain has a pronounced enrichment in 18O/16O (13 times the solar value) and depletions in 17O/16O (one-third solar) and 29Si/28Si (<0.8 times solar), indicative of formation from a type II supernova. The aggregate contains olivine (forsterite 83) grains <100 nanometers in size, with microstructures that are consistent with minimal thermal alteration. This unusually iron-rich olivine grain could have formed by equilibrium condensation from cooling supernova ejecta if several different nucleosynthetic zones mixed in the proper proportions. The supernova grain is also partially encased in nitrogen-15-rich organic matter that likely formed in a presolar cold molecular cloud.
Document ID
20050206573
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Messenger, Scott
(NASA Johnson Space Center Houston, TX United States)
Keller, Lindsay P.
Lauretta, Dante S.
Date Acquired
August 23, 2013
Publication Date
July 29, 2005
Publication Information
Publication: Science
Volume: 309
Issue: 5735
ISSN: 0036-8075
Subject Category
Lunar And Planetary Science And Exploration
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available