Formation of solid materials in the preplanetary nebula and the composition of chondrites

Journal Article · Tue Jul 01 00:00:00 EDT 1986 · Sol. Syst. Res. (Engl. Transl.); (United States)

OSTI ID:5377134

Izakov, M N

On the basis of the model of the formation of the preplanetary nebula as an accretion disk during the formation of the sun, the hypothesis is proposed that a significant fraction of the solid materials of the preplanetary nebula was formed by the successive condensation of the components of the gas of solar composition during its motion from the hot, dense region near the protosun to the periphery of the nebula into regions of ever decreasing values of temperature and pressure. The hypothesis removes the contradiction materials and the presence of traces of high-temperature phenomena in chondrite materials and the conclusion that there were never high temperature in the preplanetary nebula at distances of 2-4 AU from the sun, where meteorites encountering the earth originate, and also explains a number of properties of chondrites. It follows from this hypothesis that the mass and angular momentum of the nebula were close to their minimum possible values and that the loss of the nebular gas had already begun at the final stage of its formation.

• OSTI ID: 5377134
• Journal Information: Sol. Syst. Res. (Engl. Transl.); (United States), Vol. 20:1; Other Information: Translated from Astron. Vestn.; 20: No. 1, 35-49(Jan-Mar 1986)
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHONDRITES
CHEMICAL COMPOSITION
ORIGIN
SOLAR NEBULA
VAPOR CONDENSATION
ABUNDANCE
ACCRETION DISKS
ANGULAR MOMENTUM
CARBONACEOUS MATERIALS
COSMIC GASES
ENERGY BALANCE
ENERGY LOSSES
MASS
MATHEMATICAL MODELS
PLANETARY EVOLUTION
SOLAR SYSTEM EVOLUTION
SOLIDIFICATION
FLUIDS
GASES
LOSSES
MATERIALS
METEORITES
NEBULAE
PHASE TRANSFORMATIONS
STONE METEORITES
640107* - Astrophysics & Cosmology- Planetary Phenomena