Qian, Y.-Z. and Vogel, P. and Wasserburg, G. J. (1998) Supernovae as the Site of the r-Process: Implications for Gamma-Ray Astronomy. Astrophysical Journal, 506 (2). pp. 868-873. ISSN 0004-637X. doi:10.1086/306285. https://resolver.caltech.edu/CaltechAUTHORS:20131120-101758761
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Abstract
We discuss how detection of gamma-ray emission from the decay of r-process nuclei can improve our understanding of r-process nucleosynthesis. We find that a gamma-ray detector with a sensitivity of ~10^(-7)γ cm^(-2) s^(-1) at E_γ ≈ 100-700 keV may detect the emission from the decay of ^(125)Sb,^(137)Cs,^(144)Ce,^(155)Eu, and ^(194)Os produced in a future Galactic supernova. In addition, such a detector may determine the emission from the decay of ^(126)Sn in the Vela supernova remnant and the diffuse emission from the decay of ^(126)Sn produced by past supernovae in our Galaxy. The required detector sensitivity is similar to what is projected for the proposed Advanced Telescope for High Energy Nuclear Astrophysics (ATHENA). Both the detection of gamma-ray emission from the decay of several r-process nuclei (e.g.,^(125)Sb and ^(194)Os) produced in future Galactic supernovae and the detection of emission from the decay of ^(126)Sn in the Vela supernova remnant would prove that supernovae are a site of the r-process. Furthermore, the former detection would allow us to determine whether or not the r-process nuclei are produced in relative proportions specified by the solar r-process abundance pattern in supernova r-process events. Finally, detection of diffuse emission from the decay of ^(126)Sn in our Galaxy would eliminate neutron star-neutron star mergers as the main source for the r-process nuclei near mass number A ~ 126.
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Additional Information: | © 1998 American Astronomical Society. Received 1998 March 24; accepted 1998 May 28. We want to thank John Beacom for helping us search the Table of Isotopes, and Steve Boggs, Fiona Harrison, Tom Prince, Roberto Gallino, and Stan Woosley for discussions. This work was supported in part by the US Department of Energy under grant DE-FG03-88ER-40397, by NASA under grant NAG 5-4076, and by Division Contribution 8512(992). Y.-Z. Q. was supported by the David W. Morrisroe Fellowship at Caltech. | ||||||||||||
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Subject Keywords: | gamma rays: theory; nuclear reactions, nucleosynthesis, abundances; supernovae: general | ||||||||||||
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Issue or Number: | 2 | ||||||||||||
DOI: | 10.1086/306285 | ||||||||||||
Record Number: | CaltechAUTHORS:20131120-101758761 | ||||||||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20131120-101758761 | ||||||||||||
Official Citation: | Supernovae as the Site of the r-Process: Implications for Gamma-Ray Astronomy Y.-Z. Qian et al. 1998 ApJ 506 868 | ||||||||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||
ID Code: | 42586 | ||||||||||||
Collection: | CaltechAUTHORS | ||||||||||||
Deposited By: | Ruth Sustaita | ||||||||||||
Deposited On: | 20 Nov 2013 21:11 | ||||||||||||
Last Modified: | 10 Nov 2021 16:25 |
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