Birth of the presolar nebula - The sequence of condensation revealed in the Allende meteorite

Details Birth of the presolar nebula - The sequence of condensation revealed in the Allende meteorite Birth of the presolar nebula - The sequence of condensation revealed in the Allende meteorite

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979ap%26ss..65..275w&link_type=abstract

(Workshop on Thermodynamics and Kinetics of Dust Formation in the Space Medium, Houston, Tex., Sept. 6-8, 1978.) Astrophysics an

Astronomy and Astrophysics

Astrophysics

22

Carbonaceous Chondrites, Cosmology, Meteoritic Composition, Planetary Nebulae, Solar System, Stellar Evolution, Electron Microscopy, Grains, Inclusions, Meteoritic Microstructures, Planetary Evolution, Pyroxenes, Supernova Remnants

Scientific paper

The paper applies the supernova-trigger hypothesis for solar system formation to explain properties of the Allende meteorite. This carbonaceous chondrite meteorite is an assemblage of Ca-Al-rich inclusions (CAI's) alkali-rich spinel aggregates, and olivine chondrules in a fine-grained black matrix. Isotopic, chemical, and textural properties show that these components formed as independent cosmic grains. It appears that in the environment where these materials formed, condensation moved in the direction of increasing olivine and decreasing refractory element and (0-16) content. These properties are accounted for in a model in which a supernova remnant (SNR) in the snowplow phase pushes into a dark interstellar cloud, and condensation of CAI's begins in the SNR shell when it has been diluted with about 2500 times its mass of matter from the cloud. The retardation of the SNR by the cloud propels condensed grains ahead toward the cloud under their own momentum, and continuing dilution by the cloud can explain the fractionation patterns and depletion of refractory elements in successive condensates.

Affiliated with

Also associated with

No associations

Rating

Birth of the presolar nebula - The sequence of condensation revealed in the Allende meteorite 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 Birth of the presolar nebula - The sequence of condensation revealed in the Allende meteorite, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Birth of the presolar nebula - The sequence of condensation revealed in the Allende meteorite will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1387244