Reducing Uncertainties in the Production of the Gamma-emitting Nuclei 26 Al, 44 Ti, and 60 Fe in Core-collapse Supernovae by Using Effective Helium Burning Rates
- Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.; Michigan State Univ., East Lansing, MI (United States). Joint Inst. for Nuclear Astrophysics—Center for the Evolution of the Elements
- Michigan State Univ., East Lansing, MI (United States). Joint Inst. for Nuclear Astrophysics—Center for the Evolution of the Elements; Univ. of Minnesota, Twin Citites, Minneapolis, MN (United States). Minnesota Inst. for Astronomy, School of Physics and Astronomy; Metropolitan State Univ., St. Paul, MN (United States). Center for Academic Excellence
- Michigan State Univ., East Lansing, MI (United States). Joint Inst. for Nuclear Astrophysics—Center for the Evolution of the Elements; Univ. of Minnesota, Twin Citites, Minneapolis, MN (United States). Minnesota Inst. for Astronomy, School of Physics and Astronomy; Monash Univ., Melbourne, VIC (Australia). Monash Centre for Astrophysics, School of Physics and Astronomy
We have used effective reaction rates (ERRs) for the helium burning reactions to predict the yield of the gamma-emitting nuclei 26Al, 44Ti, and 60Fe in core-collapse supernovae (SNe). The variations in the predicted yields for values of the reaction rates allowed by the ERR are much smaller than obtained previously, and smaller than other uncertainties. A "filter" for SN nucleosynthesis yields based on pre-SN structure was used to estimate the effect of failed SNe on the initial mass function averaged yields; this substantially reduced the yields of all these isotopes, but the predicted yield ratio 60Fe/26Al was little affected. The robustness of this ratio is promising for comparison with data, but it is larger than observed in nature; possible causes for this discrepancy are discussed.
- Research Organization:
- Univ. of Minnesota, Minneapolis, MN (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Univ. of California, San Diego, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- FG02-87ER40328; AC52-06NA25396; FC02-01ER41176
- OSTI ID:
- 1537198
- Journal Information:
- The Astrophysical Journal. Letters (Online), Vol. 839, Issue 1; ISSN 2041-8213
- Publisher:
- Institute of Physics (IOP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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