Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979ap%26ss..65..351l&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
10
Cosmic Dust, Interstellar Matter, Meteoritic Composition, Nebulae, Thermodynamic Properties, Chondrule, Condensation, Fractionation, Protostars, Refractory Metals
Scientific paper
The paper examines the thermodynamics of dust formation indicated by meteorites. Much of interstellar dust probably formed in the nebulae around protostars, and mineralogy and composition of meteorites provides information that prevailed in the nebula. The fact that the gas associated with interstellar dust has solar H/S ratios indicates that FeS, which forms at 680 K, is not present in the dust, and since iron only becomes oxidized at even lower temperatures, oxidized iron is not expected in the dust. If most interstellar dust forms in the nebulae and is ejected back in space, a high temperature is indicated. High-temperature fractionation processes played an important role in the nebula, and much of the Al, Ca, and Ti evidently condensed and accreted into cm-sized objects, some of which are found in carbonaceous chondrites; they are explicable in terms of formation from a cooling neutral gas with cosmic composition.
No associations
LandOfFree
The thermodynamics of dust formation - Evidence from meteorites 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 thermodynamics of dust formation - Evidence from meteorites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The thermodynamics of dust formation - Evidence from meteorites will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1387256