Service interruption on Monday 11 July from 12:30 to 13:00: all the sites of the CCSD (HAL, Epiciences, SciencesConf, AureHAL) will be inaccessible (network hardware connection).
Skip to Main content Skip to Navigation
Journal articles

Helium and Neon Abundances and Compositions in Cometary Matter

Abstract : Materials trapped and preserved in comets date from the earliest history of the solar system. Particles captured by the Stardust spacecraft from comet 81P/Wild 2 are indisputable cometary matter available for laboratory study. Here we report measurements of noble gases in Stardust material. Neon isotope ratios are within the range observed in “phase Q,” a ubiquitous, primitive organic carrier of noble gases in meteorites. Helium displays 3He/4He ratios twice those in phase Q and in Jupiter’s atmosphere. Abundances per gram are surprisingly large, suggesting implantation by ion irradiation. The gases are probably carried in high-temperature igneous grains similar to particles found in other Stardust studies. Collectively, the evidence points to gas acquisition in a hot, high ion-flux nebular environment close to the young Sun.
Keywords : PLANET SCI
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03619246
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Friday, March 25, 2022 - 8:11:04 AM
Last modification on : Saturday, March 26, 2022 - 4:12:14 AM

Links full text

Identifiers

Collections

Citation

Bernard Marty, Russell L. Palma, Robert O. Pepin, Laurent Zimmermann, Dennis J. Schlutter, et al.. Helium and Neon Abundances and Compositions in Cometary Matter. Science, 2008, 319, pp.75. ⟨10.1126/science.1148001⟩. ⟨insu-03619246⟩

Share

Metrics

Record views

6