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The dissipation of the solar nebula constrained by impacts and core cooling in planetesimals
- Source :
- Nature Astronomy, 6 (7), Hunt, A C, Theis, K J, Rehkämper, M, Benedix, G K, Andreasen, R & Schönbächler, M 2022, ' The dissipation of the solar nebula constrained by impacts and core cooling in planetesimals ', Nature Astronomy, vol. 6, no. 7, pp. 812-818 . https://doi.org/10.1038/s41550-022-01675-2, 85th Annual Meeting of the Meteoritical-Society
- Publication Year :
- 2022
- Publisher :
- Springer Science and Business Media LLC, 2022.
-
Abstract
- Rapid cooling of planetesimal cores has been inferred for several iron meteorite parent bodies on the basis of metallographic cooling rates, and linked to the loss of their insulating mantles during impacts. However, the timing of these disruptive events is poorly constrained. Here, we used the short-lived 107Pd–107Ag decay system to date rapid core cooling by determining Pd–Ag ages for iron meteorites. We show that closure times for the iron meteorites equate to cooling in the time frame ~7.8–11.7 Myr after calcium–aluminium-rich inclusion formation, and that they indicate that an energetic inner Solar System persisted at this time. This probably results from the dissipation of gas in the protoplanetary disk, after which the damping effect of gas drag ceases. An early giant planet instability between 5 and 14 Myr after calcium–aluminium-rich inclusion formation could have reinforced this effect. This correlates well with the timing of impacts recorded by the Pd–Ag system for iron meteorites.<br />Nature Astronomy, 6 (7)<br />ISSN:2397-3366
- Subjects :
- Asteroids, comets and Kuiper belt
Core processes
Early solar system
Geochemistry
Meteoritics
CLOSURE TEMPERATURE
FOS: Physical sciences
Astronomy & Astrophysics
Physics - Geophysics
HISTORY
ACCRETION
Earth and Planetary Astrophysics (astro-ph.EP)
Science & Technology
ORIGIN
PLATINUM ISOTOPES
Astronomy and Astrophysics
FOS: Earth and related environmental sciences
Geophysics (physics.geo-ph)
GIANT PLANETS
Physical Sciences
PD-AG CHRONOMETRY
CRYSTALLIZATION
IRON-METEORITES
SYSTEM
Astrophysics - Earth and Planetary Astrophysics
Subjects
Details
- ISSN :
- 23973366
- Volume :
- 6
- Database :
- OpenAIRE
- Journal :
- Nature Astronomy
- Accession number :
- edsair.doi.dedup.....cc548eec386303b57ce529fbb67d7a56