Astronomical context of Solar System formation from molybdenum isotopes in meteorite inclusions

doi:10.1126/science.aaz8482

GSTDTAP > 气候变化

DOI	10.1126/science.aaz8482
	Astronomical context of Solar System formation from molybdenum isotopes in meteorite inclusions
	Gregory A. Brennecka; Christoph Burkhardt; Gerrit Budde; Thomas S. Kruijer; Francis Nimmo; Thorsten Kleine
	2020-11-13
发表期刊	Science
出版年	2020
英文摘要	The oldest solids that formed in the Solar System are calcium-aluminium–rich inclusions (CAIs), small metallic droplets that were later incorporated into meteorites. The ages of CAIs are conventionally taken as the age of the Solar System, but which exact moment in star formation they correspond to has been unclear. Brennecka et al. measured molybdenum isotope ratios in CAIs and found a wide range of origins in both the inner and outer Solar System. They propose that CAIs formed from heterogeneous material accreting from the presolar nebula and that the ages of CAIs coincide with the Sun's transition from a protostar to a pre–main sequence star. Science , this issue p. [837][1] Calcium-aluminum–rich inclusions (CAIs) in meteorites are the first solids to have formed in the Solar System, defining the epoch of its birth on an absolute time scale. This provides a link between astronomical observations of star formation and cosmochemical studies of Solar System formation. We show that the distinct molybdenum isotopic compositions of CAIs cover almost the entire compositional range of material that formed in the protoplanetary disk. We propose that CAIs formed while the Sun was in transition from the protostellar to pre–main sequence (T Tauri) phase of star formation, placing Solar System formation within an astronomical context. Our results imply that the bulk of the material that formed the Sun and Solar System accreted within the CAI-forming epoch, which lasted less than 200,000 years. [1]: /lookup/doi/10.1126/science.aaz8482
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/304142
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Gregory A. Brennecka,Christoph Burkhardt,Gerrit Budde,et al. Astronomical context of Solar System formation from molybdenum isotopes in meteorite inclusions[J]. Science,2020.
APA	Gregory A. Brennecka,Christoph Burkhardt,Gerrit Budde,Thomas S. Kruijer,Francis Nimmo,&Thorsten Kleine.(2020).Astronomical context of Solar System formation from molybdenum isotopes in meteorite inclusions.Science.
MLA	Gregory A. Brennecka,et al."Astronomical context of Solar System formation from molybdenum isotopes in meteorite inclusions".Science (2020).