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A Late Episode of Irradiation in the Early Solar System: Evidence from Extinct ^(36)Cl and ^(26)Al in Meteorites

Hsu, Weibiao and Guan, Yunbin and Leshin, L. A. and Ushikubo, Takayuki and Wasserburg, G. J. (2006) A Late Episode of Irradiation in the Early Solar System: Evidence from Extinct ^(36)Cl and ^(26)Al in Meteorites. Astrophysical Journal, 640 (1). pp. 525-529. ISSN 0004-637X. https://resolver.caltech.edu/CaltechAUTHORS:20131211-141250305

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Abstract

Late-formed halogen-rich phases in a refractory inclusion and a chondrule from the Allende meteorite exhibit large ^(36)S excesses that linearly correlate with the chlorine concentration, providing strong evidence in support of the existence of the short-lived nuclide ^(36)Cl (mean life of 0.43 Myr) in the early solar system. The inferred ^(36)Cl/^(35)Cl ratios at the time when these phases formed are very high (~4 × 10^(-6)) and essentially the same for the inclusion and the chondrule and confirm the earlier report of ^(36)S excess in another meteorite. In addition, the ^(36)Cl is decoupled from ^(26)Al. The observed and any possible higher levels of ^(36)Cl cannot be the result of a supernova or AGB stellar source but require a late episode of energetic particle bombardment by the early Sun, in support of the arguments based on the previous discovery of ^(10)Be. It is now clear that a blend of several sources is required to explain the short-lived nuclei when the solar system formed.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1086/500043DOIArticle
http://iopscience.iop.org/0004-637X/640/1/525PublisherArticle
ORCID:
AuthorORCID
Guan, Yunbin0000-0002-7636-3735
Wasserburg, G. J.0000-0002-7957-8029
Additional Information:© 2006 American Astronomical Society. Received 2005 October 7; accepted 2005 November 22. This work was supported by Chinese National Natural Science Foundation for Distinguished Young Scholars (grant 40325009), by the "One-Hundred-Talent Program" of the Chinese Academy of Sciences, by the Minor Planet Foundation of China, by DOE grant DE-FG-03-88ER13851 (G. J. W.), and by a NASA grant NNG 05GH3736 (L. A. L./Y. G.). The terrestrial sodalite sample used in this study was prepared by Xin Hua. The authors wish to thank M. Busso for a detailed constructive and critical review. This is Caltech Division of Geological and Planetary Science Contribution 9133(1121).
Funders:
Funding AgencyGrant Number
National Natural Science Foundation of China40325009
Chinese Academy of Sciences One Hundred Talents ProgramUNSPECIFIED
Minor Planet Foundation of ChinaUNSPECIFIED
Department of Energy (DOE)DE-FG-03-88ER13851
NASANNG 05GH3736
Subject Keywords:solar system: formation
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Caltech Division of Geological and Planetary Sciences9133
Lunatic Asylum Lab1121
Issue or Number:1
Record Number:CaltechAUTHORS:20131211-141250305
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20131211-141250305
Official Citation:A Late Episode of Irradiation in the Early Solar System: Evidence from Extinct 36Cl and 26Al in Meteorites Weibiao Hsu et al. 2006 ApJ 640 525
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:42963
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:11 Dec 2013 22:36
Last Modified:27 Nov 2019 00:05

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