Wasserburg, G. J. and Gallino, R. and Busso, M. and Goswami, J. N. and Raiteri, C. M.
(1995)
Injection of freshly synthesized ^(41)Ca in the early solar nebula by an asymptotic giant branch star.
Astrophysical Journal Letters, 440
(2).
L101-L104.
ISSN 2041-8205.
doi:10.1086/187771.
https://resolver.caltech.edu/CaltechAUTHORS:20131217-145624491
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Abstract
We show that ejecta from the envelope of one asymptotic giant branch star of M ~ 3 M_☉ may account for many of the short-lived nuclei in the early solar system and also for the recent evidence of the presence of ^(41)Ca (t_(41) = 1.50 x 10^5 yr) in early solar nebular condensates. This would require that the injection into the protosolar molecular cloud took place within a narrow time interval of (5-7) x 10^5 yr before the formation of the solar system. If true, this places extremely tight constraints on the whole process of injection mixing and collapse. The timescales for both ^(41)Ca and ^(26)AI require that the placental medium be a dense molecular cloud (2 x 10^3-8 x 10^3 H cm^(-3)). If the observed residual ^(41)Ca is instead produced by a proton bombardment mechanism within the early solar system, similar to what appears necessary to explain ^(53)Mn, then the time interval is relaxed but would still be (1-2) x 10^6 yr from consideration of ^(26)Al.
Item Type: | Article |
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Additional Information: | © 1995 American Astronomical Society. Received 1994 August 29; accepted 1994 December 2. The authors wish to thank C. Wagemans for sharing with us the early results of his studies of neutron capture on ^(41)Ca. Comments and criticisms by A. G. W. Cameron are greatly appreciated. Without E-mail and fax this work would not have been possible. This work was supported by NASA grant NAGW-3337, Division Contribution 5435(866). |
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Funders: | Funding Agency | Grant Number |
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NASA | NAGW-3337 |
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Subject Keywords: | ISM: abundances, nuclear reactions, nucleosynthesis, abundances, solar system: formation- stars: AGB and post-AGB |
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Other Numbering System: | Other Numbering System Name | Other Numbering System ID |
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Caltech Division of Geological and Planetary Sciences | 5435 | Lunatic Asylum Lab | 866 |
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Issue or Number: | 2 |
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DOI: | 10.1086/187771 |
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Record Number: | CaltechAUTHORS:20131217-145624491 |
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Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20131217-145624491 |
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Official Citation: | Injection of freshly synthesized Ca-41 in the early solar nebula by an asymptotic giant branch star
Wasserburg, G. J.; Gallino, R.; Busso, M.; Goswami, J. N.; Raiteri, C. M.
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 440, no. 2, p. L101-L104 1995 |
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Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
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ID Code: | 43053 |
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Collection: | CaltechAUTHORS |
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Deposited By: |
Ruth Sustaita
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Deposited On: | 17 Dec 2013 23:25 |
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Last Modified: | 10 Nov 2021 16:32 |
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