Primordial matter in the outer solar system - A study of its chemical composition from remote spectroscopic analysis

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Spectroscopy, Chemical Composition, Nebulae, Solar System, Spectroscopic Analysis, Abundance, Asteroids, Carbon Isotopes, Comets, Gas Giant Planets, Hydrogen, Planetary Atmospheres, Satellite Atmospheres, Solar System, Chemistry, Composition, Remote Sensing, Spectroscopy, Analysis, Atmosphere, Giant Planets, Planets, Differentiation, Dust, Structure, Jupiter, Hydrogen, Helium, Element Ratios, Saturn, Carbon, Enrichment, Models, Cores, Accretion, Formation, Satellites, Nebula, Comparisons, Nitro

Scientific paper

Spectroscopic data from ground-based, IUE and Voyager instrumentation are examined for evidence of primordial matter in the giant planets and small bodies of the solar system. Searches are conducted for primitive matter to determine conditions in the early solar system as evidenced by objects that have not changed much since then. The H2/He and D/H ratio on Jupiter has been accepted as the same for the early solar system nebula. A factor of two carbon enrichment on Jupiter and Saturn supports theories of planetary formation that posit core formation first and later accretion of an atmosphere. The Halley comet fly-bys are expected to yield data on the physical and chemical properties of dust in the Primordial Nebula.

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