The Abundance Of Live 60Fe In The Early Solar System

Details The Abundance Of Live 60Fe In The Early Solar System The Abundance Of Live 60Fe In The Early Solar System

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aipc..847..304t&link_type=abstract

ORIGIN OF MATTER AND EVOLUTION OF GALAXIES: International Symposium on Origin of Matter and Evolution of Galaxies 2005: New Hori

Other

1

Meteors, Meteorites And Tektites, Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages, Nucleosynthesis In Novae, Supernovae, And Other Explosive Environments, Supernovae

Scientific paper

Iron-60 decays to 60Ni with a half-life of 1.49 million years (Myr). Because 60Fe is produced only in stars, its initial abundance in the solar system provides a constraint on the stellar contribution of radionuclides to the solar system and on the nature of the stellar source. The initial abundance of 60Fe in the solar system has been only loosely constrained from sulfides, of which 60Fe-60Ni systems are easily disturbed, in primitive chondrites. In this study, we show that 60Fe was present in chondrules, silicate spherules commonly found in chondrites, with initial 60Fe/56Fe ratios ((60Fe/56Fe)0) of (2.2-3.7) × 10-7 at the time of their formation. By applying the time difference of 1.5-2.0 Myr between formation of the oldest known solar-system solids (Ca-Al-rich inclusions) and chondrules, a (60Fe/56Fe)0 ratio for the initial solar system of (5-10) × 10-7 is estimated. This new solidly based (60Fe/56Fe)0 ratio is consistent with predictions for nucleosynthesis in a supernova or in an intermediate-mass AGB star just before the solar-system formation, but too high for the source to have been a low-mass AGB star. Because encounters between a molecular cloud and an AGB star are rare, our results appear to be the best evidence found to date for a contribution of material from a nearby supernova to the solar system.

Affiliated with

Also associated with

No associations

Rating

The Abundance Of Live 60Fe In The Early Solar System does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Abundance Of Live 60Fe In The Early Solar System, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Abundance Of Live 60Fe In The Early Solar System will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1136718